dr hab. inż. Piotr Kiełczyński

 Zakład Teorii Ośrodków Ciągłych i Nanostruktur (ZTOCiN) Zespół Badawczy "Akustoelektronika" (ZeBAk) stanowisko: profesor nadzwyczajny telefon: (+48) 22 826 12 81 wew.: 416 pokój: 531 e-mail: pkielczy

##### Doktorat
1979Propagacja poprzecznych fal powierzchniowych w ośrodkach sprężystych o zmiennych własnościach fizycznych
 promotor -- prof. dr hab. inż. Wincenty Pajewski, IPPT PAN
323
##### Ostatnie publikacje
1.Kiełczyński P., Direct Sturm–Liouville problem for surface Love waves propagating in layered viscoelastic waveguides, Applied Mathematical Modelling, ISSN: 0307-904X, DOI: 10.1016/j.apm.2017.09.013, Vol.53, pp.419-432, 2018

Streszczenie:

This paper presents theoretical model for shear-horizontal (SH) surface acoustic waves of the Love type propagating in lossy waveguides consisting of a lossy viscoelastic layer de- posited on a lossless elastic half-space. To this end, a direct Sturm–Liouville problem that describes Love waves propagation in the considered viscoelastic waveguides was formu- lated and solved, what constitutes a novel approach to the state-of-the-art. To facilitate the solution of the complex dispersion equation, the Author employed an original ap- proach that relies on the separation of its real and imaginary part. By separating the real and imaginary parts of the resulting complex dispersion equation for a complex wave vec- tor k = k 0 + j αof the Love wave, a system of two real nonlinear transcendental algebraic equations for k 0 and αhas been derived. The resulting set of two algebraic transcenden- tal equations was then solved numerically. Phase velocity v p and coefficient of attenuation αwere calculated as a function of the wave frequency f , thickness of the surface layer h and its viscosity η44 . Dispersion curves for Love waves propagating in lossy waveguides, with a lossy surface layer deposited on a lossless substrate, were compared to those cor- responding to Love surface waves propagating in lossless waveguides, i.e., with a lossless surface layer deposited on a lossless substrate. The results obtained in this paper are orig- inal and to some extent unexpected. Namely, it was found that: 1) the phase velocity v p of Love surface waves increases as a function of viscosity η44 of the lossy surface layer, and 2) the coefficient of attenuation αhas a maximum as a function of thickness h of the lossy surface layer. The results obtained in this paper are novel and can be applied in geo- physics, seismology and in the optimal design and development of viscosity sensors, bio and chemosensors.

Słowa kluczowe:

Sturm–Liouville problem; Complex dispersion equation; Surface acoustic love waves; Eigenvalues; Elastic waves; Viscoelastic waveguides

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN
35p.
2.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A., Ptasznik S., Evaluation of High-Pressure Thermophysical Parameters of the Diacylglycerol (DAG) Oil Using Ultrasonic Waves, Food and Bioprocess Technology, ISSN: 1935-5130, DOI: 10.1007/s11947-016-1827-6, Vol.10, No.2, pp.358-369, 2017

Streszczenie:

Modeling of high-pressure technological processes in the food industry requires knowledge of thermophysical parameters of processed foodstuffs in a broad range of pressures and temperatures. However, the high-pressure thermophysical parameters of foodstuffs are very rarely published in the literature. Therefore, further research is necessary to achieve a deeper insight into the biophysical and thermophysical phenomena under pressure to provide better control of technological processes and optimize the effects of pressure. The essential goal of this work is to evaluate the impact of high pressure and temperature on the thermophysical parameters of liquid foodstuffs on the example of diacylglycerol (DAG) oil (which attracted recently a considerable attention from research and industrial communities due to its remarkable benefits for health), using ultrasonic wave velocity and density measurements. Isotherms of adiabatic and isothermal compressibility, isobaric thermal expansion coefficient, internal pressure, and thermal pressure coefficient versus pressure were evaluated, based on the measurement of the compressional ultrasonic wave velocity and density of DAG oil at high pressures (up to 500 MPa) and at various temperatures. The adiabatic compressibility is affected mostly by the changes of pressure, i.e., it grows about four times when the pressure increases from the atmospheric pressure (0.1 MPa) to 400 MPa at a temperature of 50 °C. By contrast, the internal pressure is a pronounced function of the temperature, i.e., it increases six times when the temperature rises from 20 to 50 °C at a pressure of a 200 MPa. To perform numerical calculations, it was convenient to introduce a Tammann–Tait type equation of state to approximate the measured density isotherms of the investigated DAG oil. The results obtained in this paper can be applied in modeling and optimization of high-pressure technological processes and processing of foodstuffs. Evaluation of high-pressure isotherms of the considered thermophysical parameters of the DAG oil is an original authors’ contribution to the state-of-the-art.

Słowa kluczowe:

High-pressure food processing, Diacylglycerols, Thermophysical parameters, Isothermal compressibility, Isobaric thermal expansion coefficient, Ultrasonic methods

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A. - Warsaw University of Technology (PL) Ptasznik S. - Air Force Institute of Technology (PL)
50p.
3.Kiełczyński P., Ptasznik S., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Thermophysical properties of rapeseed oil methyl esters (RME) at high pressures and various temperatures evaluated by ultrasonic methods, Biomass and Bioenergy, ISSN: 0961-9534, DOI: 10.1016/j.biombioe.2017.09.015, Vol.107, pp.113-121, 2017

Streszczenie:

Investigation of the high-pressure thermophysical properties of biofuels, e.g., bulk modulus, Surface tension, and viscosity is of paramount importance in fuel injection systems in diesel engines. Another crucial and dangerous phenomenon that may occur in biofuels at high pressures is phase transition (solidification), which can drastically increase the viscosity of the biofuel. This effect may hamper proper operation of the engine, especially under cold-start conditions. Unfortunately, the availability of highpressure thermophysical properties of biofuels is still limited. The goal of this paper is to investigate the impact of high pressures on thermophysical properties of biofuels on the example of rapeseed fatty acid methyl esters (RME) in a wide range of pressures (0:1 to 250 MPa) and temperatures (5 to 20 _C). To this end we employed innovative ultrasonic techniques, i.e., the Bleustein-Gulyaev surface acoustic waves for measuring RME viscosity, and ultrasonic bulk compressional waves for measuring sound velocity in RME and consequently evaluating RME thermophysical parameters, e.g., bulk modulus and surface tension. The viscosity of the measured RME displayed an abrupt increase at pressures: 260 MPa (t Ľ 20 _C), 230 MPa (t Ľ 15 _C), 190 MPa (t Ľ 10 _C), and 130 MPa (t Ľ 5 _C). Evidently it was a signature of the phase transition (solidification) occurring in the RME. The discovered high viscosity high-pressure phase in RME can be very detrimental for operation of modern common rail Diesel engines. Therefore, the results of research presented in this paper should be interesting for engineers and designers working with modern common rail Diesel engines using biofuels.

Słowa kluczowe:

Biofuels; Methyl esters; Phase transitions; Viscosity; Speed of sound; Ultrasonic methods; High pressure

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Ptasznik S. - Air Force Institute of Technology (PL) Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL)
35p.
4.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Propagation of ultrasonic Love waves in nonhomogeneous elastic functionally graded materials, Ultrasonics, ISSN: 0041-624X, DOI: 10.1016/j.ultras.2015.10.001, Vol.65, pp.220-227, 2016

Streszczenie:

This paper presents a theoretical study of the propagation behavior of ultrasonic Love waves in nonhomogeneous functionally graded elastic materials, which is a vital problem in the mechanics of solids. The elastic properties (shear modulus) of a semi-infinite elastic half-space vary monotonically with the depth (distance from the surface of the material). The Direct Sturm–Liouville Problem that describes the propagation of Love waves in nonhomogeneous elastic functionally graded materials is formulated and solved by using two methods: i.e., (1) Finite Difference Method, and (2) Haskell-Thompson Transfer Matrix Method.

The dispersion curves of phase and group velocity of surface Love waves in inhomogeneous elastic graded materials are evaluated. The integral formula for the group velocity of Love waves in nonhomogeneous elastic graded materials has been established. The effect of elastic non-homogeneities on the dispersion curves of Love waves is discussed. Two Love wave waveguide structures are analyzed: (1) a nonhomogeneous elastic surface layer deposited on a homogeneous elastic substrate, and (2) a semi-infinite nonhomogeneous elastic half-space. Obtained in this work, the phase and group velocity dispersion curves of Love waves propagating in the considered nonhomogeneous elastic waveguides have not previously been reported in the scientific literature. The results of this paper may give a deeper insight into the nature of Love waves propagation in elastic nonhomogeneous functionally graded materials, and can provide theoretical guidance for the design and optimization of Love wave based devices.

Słowa kluczowe:

Ultrasonic Love waves, Functionally graded materials, Profiles of elastic constants, Direct Sturm–Liouville Problem, Group velocity

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
30p.
5.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Inverse Method for Determining Profiles of Elastic Parameters in the Functionally Graded Materials using Love Waves, ACTA ACUSTICA UNITED WITH ACUSTICA, ISSN: 1610-1928, DOI: 10.3813/AAA.918961, Vol.102, pp.428-435, 2016

Streszczenie:

This paper presents the use of SH (Shear Horizontal) surface Love waves to determine the distributions of elastic parameters in nonhomogeneous Functionally Graded Materials. The advantage of Love waves applied to investigate the elastic properties of materials is that the Love wave energy (in contrast to the other types of waves, e.g., plate Lamb waves) is concentrated in the vicinity of the surface layer. The penetration depth of the SH surface Love waves depends on the frequency. Therefore, Love waves are particularly suitable for investigating the profiles of the mechanical properties in nonhomogeneous Graded Materials. Direct Problem (Direct Sturm-Liouville Problem) that describes the propagation of Love waves in nonhomogeneous graded materials has been formulated and solved numerically by applying the Transfer Matrix Method. The Inverse Procedure (Inverse Sturm-Liouville Problem) for determining the distribution of elastic properties versus depth in the nonhomogeneous materials has been developed. Love wave dispersion curves in nonhomogeneous graded materials were evaluated numerically (synthetic data). Using the evaluated dispersion curves of Love waves and a developed Inverse Procedure the distributions of elastic shear coefficient as a function of depth (distance from the surface of the material into the bulk) in a heterogeneous surface layer deposited on a homogeneous substrate have been evaluated. Power type profiles (i.e., root square, linear and quadratic) of the shear elastic coefficient in the surface layer were considered. The results of this study can be useful in the investigation of elastic properties of Graded Materials in electronics as well as in geophysics and seismology.

Słowa kluczowe:

Love waves, Inverse Methods, Functionally Graded Materials, Elastic parameters, Sturm-Liouville Problem

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
25p.
6.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Siegoczyński R.M., Ultrasonic Evaluation of Thermodynamic Parameters of Liquids Under High Pressure, IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, ISSN: 0885-3010, DOI: 10.1109/TUFFC.2015.007053, Vol.62, No.6, pp.1122-1131, 2015

Streszczenie:

In many technological processes (e.g., in the chemical, petrochemical, food, and plastics industries), liquids are subjected to high pressures and temperatures. Therefore, knowledge of their thermodynamic properties is essential for understanding, design, and control of the process technology. Direct evaluation of the thermodynamic parameters of liquids under high pressure, using conventional methods, is very difficult. Therefore, the application of these methods in industrial conditions, particularly in on-line control of the technological parameters of liquids, is practically impossible. Ultrasonic methods (e.g., sound speed measurements) are very suitable for this purpose because of their simplicity and accuracy. The sound velocity is closely related to numerous thermodynamic properties of liquids. The objective of this paper is to address the influence of temperature and pressure on the thermodynamic parameters of liquids, using the example of diacylglycerol (DAG) oil, employing ultrasonic methods. In this paper, we present ultrasonic velocity and density measurements (performed by the authors) in DAG oil over a range of pressures and temperatures. On the basis of experimental results (the sound velocity and liquid density versus pressure and temperature) a series of DAG oil thermodynamic parameters such as specific heat ratio, intermolecular free path length, Van der Waals constant b, surface tension, and effective Debye temperature were evaluated as functions of pressure and temperature.

Słowa kluczowe:

Thermodynamical properties of liquid, High pressure food processing, ultrasonic methods, sound velocity, surface tension

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation
30p.
7.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Group and Phase Velocity of Love Waves Propagating in Elastic Functionally Graded Materials, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, DOI: 10.1515/aoa-2015-0030, Vol.40, No.2, pp.273-281, 2015

Streszczenie:

This paper presents a theoretical study of the propagation behaviour of surface Love waves in nonhomogeneous functionally graded elastic materials, which is a vital problem in acoustics. The elastic properties (shear modulus) of a semi-infinite elastic half-space vary monotonically with the depth (distance from the surface of the material). Two Love wave waveguide structures are analyzed: 1) a nonhomogeneous elastic surface layer deposited on a homogeneous elastic substrate, and 2) a semi-infinite nonhomogeneous elastic half-space. The Direct Sturm-Liouville Problem that describes the propagation of Love waves in nonhomogeneous elastic functionally graded materials is formulated and solved 1) analytically in the case of the step profile, exponential profile and 1cosh2 type profile, and 2) numerically in the case of the power type profiles (i.e. linear and quadratic), by using two numerical methods: i.e. a) Finite Difference Method, and b) Haskell-Thompson Transfer Matrix Method.

The dispersion curves of phase and group velocity of surface Love waves in inhomogeneous elastic graded materials are evaluated. The integral formula for the group velocity of Love waves in nonhomogeneous elastic graded materials has been established. The results obtained in this paper can give a deeper insight into the nature of Love waves propagation in elastic nonhomogeneous functionally graded materials.

Słowa kluczowe:

surface Love waves, group velocity, phase velocity, functionally graded materials, profiles of elastic constants, direct Sturm-Liouville problem

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
15p.
8.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Siegoczyński R.M., Ptasznik S., Application of ultrasonic wave celerity measurement for evaluation of physicochemical properties of olive oil at high pressure and various temperatures, LWT-FOOD SCIENCE AND TECHNOLOGY, ISSN: 0023-6438, DOI: 10.1016/j.lwt.2014.01.027, Vol.57, pp.253-259, 2014

Streszczenie:

High-pressure processing is a powerful technology for food preservation. The knowledge of foods properties in the high-pressure range is important to develop and optimize such processes by means of mathematical modeling and simulation. Ultrasonic methods are rapid, non-invasive and can be used to characterize foods like edible oils (e.g., composition, purity, and quality assessment). In this paper, they were applied for the investigation of physicochemical properties of olive oil at high pressure at different temperatures. The sound wave velocity was measured by the pulse-transmission method and the corresponding oil density was additionally determined from the monitoring of sample volume change. Measurements were conducted in the pressure range up to 600 MPa, for temperatures from 20 to 50°C. Intermolecular free length, isothermal and adiabatic compressibility versus pressure were calculated using measured sound speed and density isotherms. Discontinuities in the measured isotherms of sound speed and density versus pressure indicate the presence of liquid-to-solid phase transitions. The kinetics of the liquid-to-solid phase transition was also investigated. The transformation times of olive oil augment with increasing temperature. This study can be broadened to other liquid foodstuffs to investigate the influence of temperature on their physicochemical properties at high pressure.

Słowa kluczowe:

Physicochemical properties, Intermolecular free length, Ultrasonic velocity, High-pressure food processing, Olive oils

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation Ptasznik S. - Air Force Institute of Technology (PL)
35p.
9.Kiełczyński P., Szalewski M., Balcerzak A., Inverse procedure for simultaneous evaluation of viscosity and density of Newtonian liquids from dispersion curves of Love waves, JOURNAL OF APPLIED PHYSICS, ISSN: 0021-8979, DOI: 10.1063/1.4891018, Vol.116, pp.044902-1-7, 2014

Streszczenie:

Simultaneous determination of the viscosity and density of liquids is of great importance in the monitoring of technological processes in the chemical, petroleum, and pharmaceutical industry, as well as in geophysics. In this paper, the authors present the application of Love waves for simultaneous inverse determination of the viscosity and density of liquids. The inversion procedure is based on measurements of the dispersion curves of phase velocity and attenuation of ultrasonic Love waves. The direct problem of the Love wave propagation in a layered waveguide covered by a viscous liquid was formulated and solved. Love waves propagate in an elastic layered waveguide covered on its surface with a viscous (Newtonian) liquid. The inverse problem is formulated as an optimization problem with appropriately constructed objective function that depends on the material properties of an elastic waveguide of the Love wave, material parameters of a liquid (i.e., viscosity and density), and the experimental data. The results of numerical calculations show that Love waves can be efficiently applied to determine simultaneously the physical properties of liquids (i.e., viscosity and density). Sensors based on this method can be very attractive for industrial applications to monitor on-line the parameters (density and viscosity) of process liquid during the course of technological processes, e.g., in polymer industry.

Słowa kluczowe:

Viscosity, Inverse problems, Wave attenuation, Mechanical waves, Viscosity measurements

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN
30p.
10.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Malanowski A., Kościesza R., Tarakowski R., Rostocki A.J., Siegoczyński R.M., Determination of physicochemical properties of diacylglycerol oil at high pressure by means of ultrasonic methods, Ultrasonics, ISSN: 0041-624X, DOI: 10.1016/j.ultras.2014.06.013, Vol.54, No.8, pp.2134-2140, 2014

Streszczenie:

The purpose of the paper is to address, using ultrasonic methods, the impact of temperature and pressure on the physicochemical properties of liquids on the example of diacylglycerol (DAG) oil. The paper presents measurements of sound velocity, density and volume of DAG oil sample in the pressure range from atmospheric pressure up to 0.6 GPa and at temperatures ranging from 20 to 50°C.

Sound speed measurements were performed in an ultrasonic setup with a DAG oil sample located in the high-pressure chamber. An ultrasonic method that uses cross-correlation method to determine the time-of-flight of the ultrasonic pulses through the liquid was employed to measure the sound velocity in DAG oil. This method is fast and reliable tool for measuring sound velocity. The DAG oil density at high pressure was determined from the monitoring of sample volume change. The adiabatic compressibility and isothermal compressibility have been calculated on the basis of experimental data. Discontinuities in isotherms of the sound speed versus pressure point to the existence of phase transitions in DAG oil. The ultrasonic method presented in this study can be applied to investigate the physicochemical parameters of other liquids not only edible oils.

Słowa kluczowe:

Ultrasonic methods, Sound velocity, Phase transitions, High pressure food processing, Physicochemical parameters

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Malanowski A. - other affiliation Kościesza R. - other affiliation Tarakowski R. - other affiliation Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation
30p.
11.Kiełczyński P., Szalewski M., Transistor Effect in the Cochlear Amplifier, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, DOI: 10.2478/aoa-2014-0012, Vol.39, No.1, pp.117-124, 2014

Streszczenie:

The paper presents a new electromechanical amplifying device i.e., an electromechanical biological transistor. This device is located in the outer hair cell (OHC), and constitutes a part of the Cochlear amplifier. The physical principle of operation of this new amplifying device is based on the phenomenon of forward mechanoelectrical transduction that occurs in the OHC's stereocilia. Operation of this device is similar to that of classical electronic Field Effect Transistor (FET). In the considered electromechanical transistor the input signal is a mechanical (acoustic) signal. Whereas the output signal is an electric signal. It has been shown that the proposed electromechanical transistor can play a role of the active electromechanical controlled element that has the ability to amplify the power of input AC signals. The power required to amplify the input signals is extracted from a battery of DC voltage. In the considered electromechanical transistor, that operates in the amplifier circuit, mechanical input signal controls the flow of electric energy in the output circuit, from a battery of DC voltage to the load resistance. Small signal equivalent electrical circuit of the electromechanical transistor is developed. Numerical values of the electrical parameters of the equivalent circuit were evaluated. The range, which covers the levels of input signals (force and velocity) and output signals (voltage, current) was determined. The obtained data are consistent with physiological data. Exemplary numerical values of currents, voltages, forces, vibrational velocities and power gain (for the assumed input power levels below 1 picowatt (10-12 W)), were given. This new electromechanical active device (transistor) can be responsible for power amplification in the cochlear amplifier in the inner ear.

Słowa kluczowe:

cochlear amplifier, acoustoelectric transducers, electromechanical transistor, equivalent circuits, field effect transistors, ion currents

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN
15p.
12.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Siegoczyński R.M., Thermodynamic Method for Measuring the B/A Nonlinear Parameter Under High Pressure, ENGINEERING TRANSACTIONS (ROZPRAWY INŻYNIERSKIE), ISSN: 0867-888X, Vol.62, No.1, pp.5-15, 2014

Streszczenie:

The nonlinearity parameter B/A is a measure of the nonlinearity of the equation of state for a fluid. The nonlinearity parameter B/A is a physical parameter often used in acoustics, from underwater acoustics to biology and medicine. It can provide information about structural properties of the medium, internal pressure and inter-molecular spacing. The thermodynamic method has been applied for determination of B/A parameter in diacylglycerol (DAG) oil as a function of pressure at various temperatures. Isotherms of the density and phase velocity of longitudinal ultrasonic wave as a function of pressure have been measured. Using the thermo- dynamic method along with measured isotherms of sound speed and density, the nonlinearity parameter B/A (for DAG oil) was evaluated as a function of pressure (up to 220 MPa) at various temperatures ranging from 20 to 50◦C.

Słowa kluczowe:

Nonlinearity parameter B/A, thermodynamic method, high pressure, longitudinal ultrasonic wave velocity

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation
7p.
13.Rostocki A.J., Tarakowski R., Kiełczyński P., Szalewski M., Balcerzak A., Ptasznik S., The Ultrasonic Investigation of Phase Transition in Olive Oil up to 0,7 GPa, JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, ISSN: 0003-021X, DOI: 10.1007/s11746-013-2223-2, Vol.90, No.6, pp.813-818, 2013

Streszczenie:

This paper presents measurements of sound velocity and attenuation in olive oil, with known chemical composition, as a function of pressure, within the range of pressure up to 0.7 GPa. Dependencies of sound velocity, relative ultrasonic wave attenuation, volume, and adiabatic compressibility on pressure show discontinuities. This proves the existence of the first order phase transition in olive oil (liquid to solid-like phase transition). Rapid and large changes in relative attenuation testify to the existence of a phase transition in olive oil. Moreover, the kinetics of phase transition was also investigated. Measurement of acoustic wave velocity and relative attenuation in olive oil during the phase transition and in the high-pressure phase is a novelty. The results obtained can be useful in the development of new methods in food (edible oils) control, processing, and preservation.

Słowa kluczowe:

Vegetable oils, Sound velocity, Triacylglycerols, Phase transition, High pressure

Afiliacje autorów:

 Rostocki A.J. - Warsaw University of Technology (PL) Tarakowski R. - other affiliation Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Ptasznik S. - Air Force Institute of Technology (PL)
30p.
14.Rostocki A.J., Malanowski A., Tarakowski R., Szlachta K., Kiełczyński P., Szalewski M., Balcerzak A., Ptasznik S., The sound velocity measurement in diacylglycerol oil under high pressure, HIGH PRESSURE RESEARCH, ISSN: 0895-7959, DOI: 10.1080/08957959.2013.769975, Vol.33, No.1, pp.172-177, 2013

Streszczenie:

In this article, the influence of high pressure on sound velocity at 293 K has been presented. The investigated diacylglycerol oil (DAG – [D82T18]AG) was composed of 82% DAGs and 18% triacylglycerols. The variation of sound velocity with hydrostatic pressure for DAG was evaluated up to 400 MPa. The phase transformation in DAG has been observed as a discontinuity of the dependence of sound velocity on pressure. The sound velocity during the phase transition has shown distinct increment. Also the volume changes have been measured. It has shown the rapid drop of the volume at the phase transformation pressure due to the possible crystallization of DAG oil.

Słowa kluczowe:

high pressure, velocity, DAG

Afiliacje autorów:

 Rostocki A.J. - Warsaw University of Technology (PL) Malanowski A. - other affiliation Tarakowski R. - other affiliation Szlachta K. - other affiliation Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Ptasznik S. - Air Force Institute of Technology (PL)
25p.
15.Malanowski A., Rostocki A.J., Kiełczyński P., Szalewski M., Balcerzak A., Kościesza R., Tarakowski R., Ptasznik S., Siegoczyński R.M., Viscosity and compressibility of diacylglycerol under high pressure, HIGH PRESSURE RESEARCH, ISSN: 0895-7959, DOI: 10.1080/08957959.2013.775649, Vol.33, No.1, pp.178-183, 2013

Streszczenie:

The influence of high pressure on viscosity and compressibility of diacylglycerol (DAG) oil has been presented in this paper. The investigated DAG oil was composed of 82% of DAGs and 18% TAGs (triacylglycerols). The dynamic viscosity of DAG was investigated as a function of the pressure up to 400 MPa. The viscosity was measured by means of the surface acoustic wave method, where the acoustic waveguides were used as sensing elements. As the pressure was rising, the larger ultrasonic wave attenuation was observed, whereas amplitude decreased with the liquid viscosity augmentation. Measured changes of physical properties were most significant in the pressure range near the phase transition. Deeper understanding of DAG viscosity and compressibility changes versus pressure could shed more light on thermodynamic properties of edible oils.

Słowa kluczowe:

DAG viscosity, compressibility, phase transitions, transmitted and scattered light

Afiliacje autorów:

 Malanowski A. - other affiliation Rostocki A.J. - Warsaw University of Technology (PL) Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Kościesza R. - other affiliation Tarakowski R. - other affiliation Ptasznik S. - Air Force Institute of Technology (PL) Siegoczyński R.M. - other affiliation
25p.
16.Kiełczyński P., Power Amplification and Selectivity in the Cochlear Amplifier, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, DOI: 10.2478/aoa-2013-0010, Vol.38, No.1, pp.83-92, 2013

Streszczenie:

This paper presents a new model that describes the physical phenomena occurring in an individual Outer Hair Cell (OHC) in the human hearing organ (Cochlea). The new model employs the concept of parametric amplification and piezoelectricity. As a consequence, the proposed model may explain in a natural way many as yet unresolved problems about the mechanisms of: 1) power amplification, 2) nonlinearity, 3) fine tuning, or 4) high sensitivity that take place in the human hearing organ. Mathematical analysis of the model is performed. The equivalent electrical circuits of an individual OHC are established. The high selectivity of the OHC parametric amplifier is analyzed by solving the resulting Mathieu and Ince differential equations. An analytical formula for the power gain in the OHC’s parametric amplifier has been developed. The proposed model has direct physical interpretation and all its elements have their physical counterparts in the actual structure of the cochlea. The numerical values of the individual elements of the electrical equivalent circuits are consistent with the experimental physiological data. It is anticipated that the proposed new model may contribute in future improvements of human cochlear implants as well as in development of new digital audio standards.

Słowa kluczowe:

piezoelectricity, parametric amplification, mechanism of hearing, electroacoustic transducers

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN
20p.
17.Piekarski S., Kiełczyński P., Szalewski M., Rewekant M., Computer-based simulation of plasma concentration time-profiles of drug in nonlinear two-compartment model, COMPUTER ASSISTED METHODS IN ENGINEERING AND SCIENCE, ISSN: 2299-3649, Vol.20, pp.279-288, 2013

Streszczenie:

The main interest of pharmacokinetics is the study of the fate of drugs in the living organism. This work proposes the system of the conservation laws that describes time-dependent concentrations of a drug, after a single intravenous administration. Compared with others, the proposed model considers both free and protein-bound drug concentrations at the same time. Plasma protein binding captured in the model enters the nonlinearity arising from the Guldberg-Waage law. According to our best knowledge, the analytical solution for our system does not exist. Our model allows the calculation of the free and bound-drug protein concentrations at any time point and at any dose after single intravenous bolus dose administration. In order to compare the empirical with simulated data, a numerical approach has been proposed. On the basis of published experimental data the model validation has been carried out. The goodness of fit was satisfactory (R2 = 0.99) and the experimental and simulated AUC (area under the curve) values, as the measure of the bioavailability of drug, were similar (150 M/hxh−1). The preliminary assessment of the model credibility was positive and encouraged further studies.

Słowa kluczowe:

Evolution equations, non-linear model, drug protein binding

Afiliacje autorów:

 Piekarski S. - IPPT PAN Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Rewekant M. - Medical University of Warsaw (PL)
4p.
18.Kiełczyński P., Szalewski M., Balcerzak A., Malanowski A., Siegoczyński R.M., Ptasznik S., Investigation of high-pressure phase transitions in DAG (diacylglycerol) oil using the Bleustein–Gulyaev ultrasonic wave method, FOOD RESEARCH INTERNATIONAL, ISSN: 0963-9969, DOI: 10.1016/j.foodres.2012.07.025, Vol.49, pp.60-64, 2012

Streszczenie:

In this paper, phase transitions in diacylglycerol (DAG) oil are investigated by using an ultrasonic method for measuring viscosity. Viscosity of diacylglycerol (DAG) oil is measured over a wide range of hydrostatic pressures up to 500 MPa, and at temperatures ranging from 10 to 40 °C. The observed discontinuities in the viscosity versus pressure curves (isotherms) indicate phase transitions. An original ultrasonic method that uses the surface acoustic Bleustein–Gulyaev (B–G) wave was employed to measure the viscosity of DAG oil at high pressure range. This method allows for fast and reliable measurement of DAG oil viscosity along various isotherms. Moreover, the kinetics of the observed phase transformations at various temperatures was analyzed. The results of the study are a novelty, and can be helpful in evaluating the physicochemical properties of edible oils.

Słowa kluczowe:

Edible oils, Ultrasonic methods, Diacylglycerols, Viscosity, Phase transitions, High pressure

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Malanowski A. - other affiliation Siegoczyński R.M. - other affiliation Ptasznik S. - Air Force Institute of Technology (PL)
40p.
19.Kiełczyński P., Szalewski M., Balcerzak A., Effect of a viscous liquid loading on Love wave propagation, INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, ISSN: 0020-7683, DOI: 10.1016/j.ijsolstr.2012.04.030, Vol.49, No.17, pp.2314-2319, 2012

Streszczenie:

This paper describes a theory of surface Love waves propagating in a layered elastic waveguide loaded on its surface by a viscous (Newtonian) liquid. An analytical expression for the complex dispersion equation of Love waves has been established. The real and imaginary parts of the complex dispersion equation were separated and resulting system of nonlinear algebraic equations was solved numerically. The influence of the viscosity of liquid on the dispersion curves of phase velocity, the wave attenuation and the distribution of the Love wave amplitude is analyzed numerically. The propagation loss is produced only by the viscosity of liquids. Elastic layered waveguide is assumed to be loss-less. The numerical solutions show the dependence of the phase velocity change, the wave attenuation and the wave amplitude distribution in terms of the liquid viscosity and the wave frequency. The results of the investigations are fundamental and can be applied in the design and development of liquid viscosity sensors and biosensors, in Non-Destructive Testing (NDT) of materials, in geophysics and seismology.

Słowa kluczowe:

Love waves, Viscous liquids, Dispersion relations, Attenuation, Viscosity sensors

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN
40p.
20.Rostocki A.J., Siegoczyński R.M., Kiełczyński P., Szalewski M., Balcerzak A., Zduniak M., Employment of a novel ultrasonic method to investigate high pressure phase transitions in oleic acid, HIGH PRESSURE RESEARCH, ISSN: 0895-7959, Vol.31, No.2, pp.334-338, 2011

Streszczenie:

In this work, the variation of sound velocity with hydrostatic pressure for oleic acid is evaluated up to 350MPa. During the measurement, we identified the phase transformation of oleic acid and the presence of the hysteresis of the dependence of sound velocity on pressure. From the performed measurements, it can be seen that the dependence of sound velocity on pressure can be used to investigate phase transformations in natural oils. Ultrasonic waves were excited and detected using piezoelectric LiNbO3(Y-36 cut) 5MHz transducers. The phase velocity of the longitudinal ultrasonicwaveswas measured using a cross-correlation method to evaluate the time of flight.

Słowa kluczowe:

Sound velocity, oleic acid, high pressure, phase transition

Afiliacje autorów:

 Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Zduniak M. - other affiliation
25p.
21.Kiełczyński P., Szalewski M., Balcerzak A., Rostocki A.J., Tefelski D.B., Application of SH surface acoustic waves for measuring the viscosity of liquids in function of pressure and temperature, Ultrasonics, ISSN: 0041-624X, Vol.51, No.8, pp.921-924, 2011

Streszczenie:

Viscosity measurements were carried out on triolein at pressures from atmospheric up to 650 MPa and in the temperature range from 10 C to 40 C using ultrasonic measuring setup. Bleustein–Gulyaev SH surface acoustic waves waveguides were used as viscosity sensors. Additionally, pressure changes occurring during phase transition have been measured over the same temperature range. Application of ultrasonic SH surface acoustic waves in the liquid viscosity measurements at high pressure has many advantages. It enables viscosity measurement during phase transitions and in the high-pressure range where the classical viscosity measurement methods cannot operate. Measurements of phase transition kinetics and viscosity of liquids at high pressures and various temperatures (isotherms) is a novelty. The knowledge of changes in viscosity in function of pressure and temperature can help to obtain a deeper insight into thermodynamic properties of liquids.

Słowa kluczowe:

SH surface acoustic waves, Viscosity, High pressure, Phase transitions

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Tefelski D.B. - other affiliation
25p.
22.Kiełczyński P., Szalewski M., An inverse method for determining the elastic properties of thin layers using Love surface waves, INVERSE PROBLEMS IN SCIENCE AND ENGINEERING, ISSN: 1741-5977, Vol.19, No.1, pp.31-43, 2011

Streszczenie:

Estimation of the mechanical and geometrical parameters of thin coatings and surface layers in materials is of great practical importance in engineering and technology. Indeed, surface properties of many vital engineering components, such as turbine blades, pistons, or bearings, directly affect longevity and safety of the modern machinery. In this article, the authors present a novel inversion procedure for simultaneous determination of thickness, shear elastic constant, and density of thin coating layers in materials. The inversion procedure is based on measurements of the dispersion curve for surface acoustic waves of the Love type. The inverse problem is formulated as an optimization problem with the appropriately designed objective function, depending on the material parameters of the coating layer, ultrasonic frequency, and the experimental data, i.e. measured phase velocity of the surface Love wave. The minimization of the objective function provides three parameters of a thin layer, i.e. its thickness, shear elastic constant, and density. The proposed inverse method was checked experimentally for different layered structures, such as copper layer on steel substrate or ceramics-on-ceramics. The agreement between the results of calculations with the proposed inversion method and the experimental data was good.

Słowa kluczowe:

Inverse problems, Love surface waves, elastic constants, acoustic wave dispersion, thin layers

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN
20p.
23.Rostocki A.J., Siegoczyński R.M., Kiełczyński P., Szalewski M., An application of Love SH waves for the viscosity measurement of triglycerides at high pressures, HIGH PRESSURE RESEARCH, ISSN: 0895-7959, Vol.30, No.1, pp.88-92, 2010

Streszczenie:

A new ultrasonic method of viscosity measurement at a high-pressure condition has been presented. The method is based on the Love wave amplitude measurement. The same electronic setup as in the Bleustein– Gulyaev (B–G)wave method applied by the authors recently for a high-pressure measurementwas adopted. The new transducers were made of metallic materials which make them more reliable at high-pressure conditions. The method has been successfully applied for the viscosity measurement of some triglycerides at high-pressure conditions up to 1GPa. The results have been compared with the earlier results obtained using B–G waves. This comparison has shown that Love wave method sensors are more reliable than B–G wave sensors and cheaper in fabrication, although the sensitivity of Love wave sensors was lower. During the measurement, the phase transitions in the investigated liquids were observed.

Słowa kluczowe:

Love SH waves, viscosity, phase transitions, sensors

Afiliacje autorów:

 Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN
27p.
24.Kiełczyński P., Szalewski M., Determination of the elastic properties of thin layers and graded materials using generalized Love waves, IEICE Technical Report, ISSN: 0913-5685, Vol.109, No.388, pp.117-122, 2010

Streszczenie:

The elastic properties of coatings and graded materials are very important in the design and evaluation for engineering purposes. It is well known that the velocity of the ultrasonic surface waves propagating in the layered structures and graded materials is strongly dependent on the elastic properties of the medium. Thus, by using an appropriate inverse algorithm, the elastic properties can be deduced from the measured phase velocity dispersion curves (dependence of velocity on frequency) of the surface wave.
In this study we applied generalized shear surface waves (i.e., generalized Love waves) to investigate the elastic parameters of the layered media and graded materials. Generalized Love waves posses only one component of the mechanical displacement what is an advantage. Due to this reason, the mathematical description of the propagation of generalized Love waves is simpler than that using Rayleigh waves.
In this article an inversion procedure for determining the elastic and geometrical parameters of thin coating layers from the measured dispersion curves of ultrasonic shear surface waves (i.e., Love waves) is presented. The inverse problem is formulated as an optimization problem with appropriately developed objective function. The objective function depends on the material parameters of the coating layer, frequency, and experimental data (phase velocity of the surface Love wave). The minimization of the objective function leads to a set of the optimum mechanical parameters of the thin layers (e.g., thickness, shear elastic constants). Good conformity between the experimental dispersion curves and those resulting from the inverse method can prove the correctness of the proposed inverse procedure.

Słowa kluczowe:

Inverse Problems, Love waves, elastic constants, acoustic dispersion, thin layers, graded materials

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN
25.Kiełczyński P., Szalewski M., Siegoczyński R.M., Rostocki A.J., New ultrasonic Bleustein-Gulyaev wave method for measuring the viscosity of liquids at high pressure, REVIEW OF SCIENTIFIC INSTRUMENTS, ISSN: 0034-6748, Vol.79, No.2, pp.26109-0, 2008

Streszczenie:

In this paper, a new method for measuring the viscosity of liquids at high pressure is presented. To this end the authors have applied an ultrasonic method using the Bleustein-Gulyaev (BG) surface acoustic wave. By applying the perturbation method, we can prove that the change in the complex propagation constant of the BG wave produced by the layer of liquid loading the waveguide surface is proportional to the shear mechanical impedance of the liquid. In the article, a measuring setup employing the BG wave for the purpose of measuring the viscosity of liquids at high pressure (up to 1 GPa) is presented. The results of high-pressure viscosity measurements of triolein and castor oil are also presented. In this paper the model of a Newtonian liquid was applied. Using this new method it is also possible to measure the viscosity of liquids during the phase transition and during the decompression process hysteresis of the dependence of viscosity on pressure.

Słowa kluczowe:

Bleustein-Gulyaev (B-G) waves, high pressure, viscosity measurements, phase transitions

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Siegoczyński R.M. - other affiliation Rostocki A.J. - Warsaw University of Technology (PL)
26.Kiełczyński P., Metody ultradźwiękowe identyfikacji własności sprężystych materiałów gradientowych, INŻYNIERIA MATERIAŁOWA, ISSN: 0208-6247, Vol.3, pp.157-164, 2008

Streszczenie:

In the paper the application of the generalized shear surface waves for the determination of the elastic parameters of non-uniform Functionally Graded Materials, based on the example of steel samples subjected to the laser hardening was presented. In the article, the use of the bulk and surface ultrasonic waves for evaluation of the mechanical parameters of materials is discussed. Ultrasonic methods for investigation of the material properties are non-destructive methods. This is a main advantage of the ultrasonic methods in relation to the mechanical methods used for investigation of the mechanical properties of materials. Moreover, ultrasonic methods can be computerized. Due to this reason, ultrasonic methods can be employed directly on the production line for measuring the mechanical parameters of materials.
The importance of the shear surface waves (i.e., Love waves, and generalized shear surface waves) in the investigations of elastic parameters of Functionally Graded Materials - FGM was stressed. Energy of the shear surface waves (in contrast to the other types of waves, e.g., plate Lamb waves) is concentrated in the surface layer. The penetration depth of the shear surface waves depends on frequency. Therefore, they are very useful to determine the profiles of the mechanical properties of non-homogeneous Functionally Graded Materials.
Employing the variational method (Rayleigh quotient), the inverse method (Inverse Sturm-Liouville problem) was presented which enabled the determination of the profiles of elastic properties as a function of depth in the investigated non-homogeneous material.
By using the measured dispersion curves of the Love waves (generalized shear surface waves) and developed inverse procedure, the distributions of the elastic compliance versus depth (the distance from the surface of steel 45 exposed to laser hardening) were determined, along with the case depths in the investigated steel samples.

Słowa kluczowe:

Love waves, Functionally Graded Materials, elastic properties, Inverse methods, nondestructive testing

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN
27.Kiełczyński P., Szalewski M., Compound piezoelectric cylindrical resonators as sensors of the rheological parameters of viscoelastic media, IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, ISSN: 0885-3010, DOI: 10.1109/TUFFC.2007.373, Vol.54, No.6, pp.1199-1206, 2007

Streszczenie:

The electro-elastic behavior of a viscoelastically loaded layered cylindrical resonator (sensor) comprising two coupled hollow cylinders is presented. The inner cylinder is a piezoelectric ceramic tube. The outer cylinder is a non-piezoelectric (passive) metallic cylinder. An analytical formula for the electrical admittance of a compound layered cylindrical resonator loaded with a viscoelastic liquid is established. Admittance (conductance) diagrams were obtained using a continuum electromechanical model. The established analytical formulas enable the determination of the influence of the liquid viscosity, material, and geometrical parameters of a compound cylindrical resonator on the response characteristics of the compound sensor. In the paper, the sensor implications resulting from the performed analysis are described. Moreover, the algorithm of the method developed by the authors to evaluate the rheological parameters of a viscoelastic liquid is presented. Good agreement between the theoretical results and experimental data is shown. The analysis presented in this paper can be utilized for the design and construction of cylindrical piezoelectric viscosity sensors, annular accelerometers, filters, transducers, and multilayer resonators.

Słowa kluczowe:

Compound piezoelectric resonators, admittance diagrams, viscosity measurements, sensors of rheological parameters

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN
28.Kiełczyński P., The Analog of the Kanazawa-Gordon Formula for Cylindrical Resonators, IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, ISSN: 0885-3010, DOI: 10.1109/TUFFC.2004.1367474, Vol.51, No.11, pp.1367-1372, 2004

Streszczenie:

In this paper, a formula relating the shift in the resonant frequency of a shear piezoceramic cylindrical resonator to the viscosity of a Newtonian liquid that loads the resonator surface was established. This formula is analogous to the classical Kanazawa-Gordon formula that describes the change in the resonant frequency of a shear planar resonator loaded with a Newtonian liquid. To this end, the author applied the perturbation method to analyze the behavior of the piezoceramic cylindrical resonators vibrating in a shear mode and loaded with a viscous liquid. The shift in resonant frequency obtained using the perturbation method (mechanical model) was compared to an exact value of the shift in resonant frequency obtained from the complete electromechanical model (admittance diagrams) that describes shear vibrations of a piezoceramic cylindrical resonator loaded with a viscous liquid. Good conformity between the two types of results obtained can prove the correctness of the analytical formulas established in this paper. The results of this work can be applied for the design and construction of viscosity sensors.

Słowa kluczowe:

Viscosity, Resonant frequency, Perturbation methods, Elasticity, Piezoelectric materials, Admittance, Surface acoustic waves, Vibrations, Surface impedance, Resonance

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN
29.Kiełczyński P., Pajewski W., Szalewski M., Balcerzak A., Measurement of the shear storage modulus and viscosity of liquids using the Bleustein–Gulyaev wave, REVIEW OF SCIENTIFIC INSTRUMENTS, ISSN: 0034-6748, DOI: 10.1063/1.1765760, Vol.75, No.7, pp.2362-2367, 2004
30.Kiełczyński P., Pola akustyczne przetworników i układów ultradźwiękowych o niejednorodnym rozkładzie amplitudy drgań na powierzchni (Praca habilitacyjna), Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.5, pp.1-72, 1996

##### Lista rozdziałów w ostatnich monografiach
 1.6 Kiełczyński P., Surface Waves - New Trends and Developments, rozdział: Properties and Applications of Love Surface Waves in Seismology and Biosensors, IntechOpen – London , pp.17-42, 2018 2.556 Kiełczyński P., Advances in Clinical Audiology, rozdział: Power Amplification and Frequency Selectivity in the Inner Ear: A New Physical Model, IntechOpen, 1, pp.59-98, 2017 3.557 Kiełczyński P., Ultrasound in Food Processing: Recent Advances, rozdział: The Application of Ultrasonics for Oil Characterization, Wiley-Blackwell, 1, pp.116-145, 2017 4.25 Kiełczyński P., Acoustic Waves, rozdział: Application of acoustic waves to investigate the physical properties of liquids at high pressure, Ed. D.W. Dissanayake, Sciyo, Rijeka, Croatia, pp.317-340, 2010

##### Prace konferencyjne
1.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Ptasznik S., Rostocki A.J., What Information about High-Pressure Thermophysical Properties of Liquids Can Provide Low-Intensity Ultrasonic Waves, IUS 2018, IEEE International Ultrasonics Symposium, 2018-10-22/10-25, KOBE (JP), pp.1-4, 2018

Streszczenie:

In many technological processes liquids are subjected to high pressures (up to 800 MPa), e.g., in high pressure preservation of liquid foodstuffs. Similarly, in modern fuel injection systems for diesel engines, biofuels are subjected to pressures up to 300 MPa. In such severe conditions, thermophysical properties of liquid change considerably. Conventional methods for measuring thermophysical properties of liquids completely fail at high pressure conditions. Hence, these methods are of no use in real industrial conditions, during on-line monitoring of industrial processes. Thus, there exist a strong demand for industrial grade measurements methods, which can be used to monitor on-line the actual parameters of liquids. A very promising solution is offered by ultrasonic techniques which are particularly suitable for measurements of thermophysical properties of liquids at high pressures. In addition, the ultrasonic methods (that use low-intensity ultrasonic waves) are totally non-destructive and can be fully automated in real time.

Słowa kluczowe:

ultrasonic methods, thermophysical properties, high pressure, acoustic impedance, thermal conductivity

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Ptasznik S. - Air Force Institute of Technology (PL) Rostocki A.J. - Warsaw University of Technology (PL)
2.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Ptasznik S., Rostocki A.J., Investigation of regular and anomalous behavior of liquid media under high pressure using ultrasonic methods, IUS 2017, IEEE International Ultrasonics Symposium, 2017-09-06/09-09, Washington, DC (US), pp.1-4, 2017

Streszczenie:

In many industrial technological processes, liquids are subjected to high pressures, e.g., in the high pressure food preservation. Similarly, in modern fuel injection systems for diesel engines, biofuel is subjected to a pressure up to 300 MPa. In such conditions, in liquids, high-pressure phase transitions (solidification) can occur that substantially increase the density and liquid viscosity. This solidification can result in significant problems with engine failure under cold-start conditions. This is an evident recipe for disaster, since the engine and its accessories would be very likely quickly destroyed. Thus, it is important to determine at what pressures and temperatures phase transitions occur. Conventional mechanical methods for measuring physicochemical properties of liquids at these extreme conditions do not operate. By contrast, ultrasonic techniques are very suitable for measurements of hysicochemical properties of liquids at high pressure, since they are non-destructive, can be fully automated and are characterized by the absence of moving parts. The aim of this work is to study the high-pressure hysicochemical properties of liquids (exemplified by a Camelina sativa - false flax oil) using novel ultrasonic methods.

Słowa kluczowe:

pressure; ultrasonic methods; phase transitions; Camelina sativa

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Ptasznik S. - Air Force Institute of Technology (PL) Rostocki A.J. - Warsaw University of Technology (PL)
15p.
3.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., The influence of rheological parameters of viscoelastic liquids on the propagation characteristics of ultrasonic Love waves, IUS 2017, IEEE International Ultrasonics Symposium, 2017-09-06/09-09, Washington, DC (US), pp.1-4, 2017

Streszczenie:

Progress in materials science has led to development of new materials with improved functional characteristics. One of the new types of materials introduced into industrial practice are plastics and polymers. These materials exhibit rheological (viscoelastic) properties, which combine simultaneously the properties of liquids and solids. Due to their attractive features, such as low specific weight, high resistance to chemical agents, ease of processing, cost ffectiveness etc. these materials are widely used in chemical, automotive, aviation and space industry. In addition, these materials are very common in many aspects of everyday life. Thus, it is very important, both from the theoretical and practical point of view, to develop new, robust and accurate methods to measure the rheological parameters (viscosity η, elasticity μ and density ρ) of plastics and polymers. The conventional mechanical methods used so far to this end are outdated, time consuming, and cumbersome. Ultrasonic methods do not possess these disadvantages. The first step in the formulation of the Inverse Method for evaluating the rheological parameters of viscoelastic liquids is to formulate and solve the Direct Sturm-Liouville Problem for Love waves propagating in the investigated layered elastic aveguide loaded on its surface with various types of viscoelastic materials (e.g., liquids). The aim of this study is to develop a rigorous mathematical model (Direct Sturm-Liouville Problem) of propagation of shear horizontal (SH) surface Love waves in layered viscoelastic structures, i.e., in layered elastic waveguides with a guiding surface layer covered with a viscoelastic material described by Kelvin-Voigt, Newton and Maxwell viscoelastic models respectively

Słowa kluczowe:

Love waves; viscoelastic liquid; Sturm-Liouville problem; dispersion curves

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
15p.
4.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Evaluation of viscoelastic parameters of surface layers by ultrasonic Love waves, IUS 2016, IEEE International Ultrasonics Symposium, 2016-09-18/09-21, Tours (FR), DOI: 10.1109/ULTSYM.2016.7728446, pp.1-4, 2016

Streszczenie:

Simultaneous determination of the rheological parameters of viscoelastic surface layers is very important in many applications such as: sensors, geophysics, seismology, and in the NDT of materials. Love wave energy is concentrated near the waveguide surface, so that Love waves are especially suited to study the material properties of surface layers. In this work, the Direct Sturm-Liouville Problem for the Love wave propagation in a layered viscoelastic waveguide have been presented and solved. Next, the Inverse Problem was created and solved as an Optimization Problem. The adequately formulated objective function that depends on the elastic and viscoelastic parameters of a waveguide of the Love wave and the experimental data was used. The solution of the Inverse Problem allows to determine unknown values of the viscosity and shear elasticity of a viscoelastic medium from measurements of the dispersion curves of Love waves.

Słowa kluczowe:

Love waves, rheological properties, viscoelastic materials, inverse problems, viscosity, shear elasticity

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
15p.
5.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Ptasznik S., Investigation of high-pressure phase transitions in biofuels by means of ultrasonic methods, IUS 2016, IEEE International Ultrasonics Symposium, 2016-09-18/09-21, Tours (FR), DOI: 10.1109/ULTSYM.2016.7728444, pp.1-4, 2016

Streszczenie:

The fundamental goal of this work is to verify the hypothesis of the existence of high-pressure phase transitions in biofuel components on the example of rapeseed fatty acid methyl esters (RME), by using ultrasonic methods. in a wide range of pressures (from atmospheric pressure to 300 MPa) and for various temperatures from 5 to 20 °C. Investigation of phase transitions in biofuels at high pressures is of great importance in the design of injection systems in modern diesel engines (common rail). Direct examination of phase transitions in liquids under high pressure, using classical methods, is very difficult. To overcome this disadvantage, the authors applied ultrasonic methods (viscosity measurement), which in contrast to the classical methods allow in a relatively simple way the investigation of high-pressure properties of liquids. Viscosity was measured by the original method that uses ultrasonic surface waves of the Bleustein-Gulyaev type, developed by the authors at the Institute of Fundamental Technological Research in Warsaw. From the measured viscosity isotherms, the occurrence of high-pressure phase transitions in methyl esters were evaluated.

Słowa kluczowe:

high-pressure phase transitions, biofuels, ultrasonic Bleustein-Gulyaev waves, viscosity measurements

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Ptasznik S. - Air Force Institute of Technology (PL)
15p.
6.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Inverse method for evaluation of elastic parameters in functionally graded materials using ultrasonic Love wave, IUS 2015, IEEE International Ultrasonics Symposium, 2015-10-21/10-24, Taipei (TW), DOI: 10.1109/ULTSYM.2015.0344, pp.1-4, 2015

Streszczenie:

The aim of this study was to evaluate the inverse procedure to determine profiles (as a function of depth) of the mechanical properties of inhomogeneous FGM resulting from the application of various technological processes of surface treatment. First, the Direct Sturm-Liouville Problem for Love waves propagating in elastic graded materials with various profiles of the shear stiffness as a function of the distance from the surface, has been solved using the Finite Difference Method and Transfer Matrix Method (Haskell-Thompson method). Love wave dispersion curves were evaluated in the frequency range from 4 to 23 MHz. The Inverse Problem was formulated as an Optimization Problem with appropriately constructed objective function that depended on the material properties of an elastic waveguide of the Love wave and the experimental data. To minimize the considered objective function, optimization procedures of the Nelder-Mead type from Scilab software package were employed.

Słowa kluczowe:

Love waves, Inverse Methods, Functionally Graded Materials, Elastic parameters, Sturm-Liouville Problem

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
15p.
7.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Siegoczyński R.M., Ptasznik S., Ultrasonic studies of physicochemical parameters of biofuels in a broad range of pressures and temperatures, IUS 2015, IEEE International Ultrasonics Symposium, 2015-10-21/10-24, Taipei (TW), DOI: 10.1109/ULTSYM.2015.0345, pp.1-4, 2015

Streszczenie:

The aim of the study was to investigate the phase transitions in biofuel components by using ultrasonic methods on the example of methyl esters of fatty acids, in a wide range of pressures (from atmospheric pressure to 400 MPa) and for various temperatures from 5 to 20 °C. Investigation of phase transitions in biofuels at high pressures is of great importance in the design of injection systems in modern diesel engines (common rail). Direct examination of phase transitions in liquids under high pressure, using classical methods, is very difficult. To overcome this disadvantage, the authors applied ultrasonic methods (viscosity measurement), which in contrast to the classical methods allow in a relatively simple way the investigation high-pressure properties of liquids. Viscosity was measured by the original method that uses ultrasonic surface waves of the Bleustein-Gulyaev type, developed by the authors at the Institute of Fundamental Technological Research in Warsaw. From the measured viscosity isotherms, the occurrence and kinetics of high-pressure phase transitions in methyl esters were evaluated.

Słowa kluczowe:

High pressure phase transitions, physicochemical parameters of biofuels, ultrasonic viscosity measurements, rapeseed methyl esters

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation Ptasznik S. - Air Force Institute of Technology (PL)
15p.
8.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Density and viscosity of liquids determination using an inverse method for Love wave propagation, IUS 2014, IEEE International Ultrasonics Symposium, 2014-09-03/09-06, Chicago (US), DOI: 10.1109/ULTSYM.2014.0496, pp.1992-1995, 2014

Streszczenie:

The aim of this work was to establish an inversion procedure for the simultaneous determination of the viscosity and density of liquids. To this end, measurements of dispersion curves of the phase velocity and attenuation of shear horizontal Love waves were applied. Love waves propagate in an elastic layered waveguide covered on its surface with an investigated viscous (Newtonian) liquid. Firstly, the Direct Sturm-Liouville Problem of the Love wave propagation in a such waveguide was formulated and solved. Subsequently, the Inverse Problem was formulated and solved as an Optimization Problem. The appropriately constructed objective function that depends on the material properties of a waveguide of the Love wave, material properties of an investigated liquid (viscosity and density), and the experimental data was employed. The simultaneous determination of both liquid density and viscosity is important in the monitoring of technological processes in many industries (e.g. chemical, petroleum, pharmaceutical industry) as well as in geophysics.

Słowa kluczowe:

Love waves, Inverse Methods, Density, Viscosity of liquids , Sturm-Liouville Problem

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
10p.
9.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Siegoczyński R.M., Ultrasonic evaluation of thermodynamic parameters of liquids under high pressure, IUS 2014, IEEE International Ultrasonics Symposium, 2014-09-03/09-06, Chicago (US), DOI: 10.1109/ULTSYM.2014.0497, pp.1996-1999, 2014

Streszczenie:

In many technological processes (e.g. in chemical, petrochemical, food and plastics industry) liquids are subjected to high pressures and temperatures. Therefore knowledge of their thermodynamic properties is essential for understanding, design and control of the process technology. Direct evaluation of thermodynamic parameters of liquids under high pressure, using conventional methods, is very difficult. Therefore, these methods are useless in industrial conditions, particularly in on-line control of the technological parameters of liquids. Ultrasonic methods (e.g., sound speed measurements) due to their simplicity and accuracy are very suitable for this purpose. The sound velocity is closely related with numerous thermodynamic properties of liquids. In this paper we report ultrasonic velocity and density measurements (performed by the authors) in diacylglycerol (DAG) oil over a range of pressures and temperatures. On the basis of experimental results (the sound velocity and liquid density versus pressure and temperature) the thermal expansion coefficient, specific heat capacity at constant pressure, isothermal and adiabatic compressibility of DAG oil were calculated as a function of pressure and temperature.

Słowa kluczowe:

Themodynamic parameters of liquids, high pressure, ultrasonic velocity, density, compressibility

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation
10p.
10.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Siegoczyński R.M., Thermodynamic method for measuring the B/A nonlinear parameter under high pressure, IUS 2013, IEEE International Ultrasonics Symposium, 2013-07-21/07-25, Praga (CZ), DOI: 10.1109/ULTSYM.2013.0424, Vol.1, pp.1665-1667, 2013

Streszczenie:

The nonlinearity parameter B/A is a measure of the nonlinearity of the equation of state for a fluid. It plays a significant role in acoustics, from underwater acoustics to biology and medicine. The nonlinearity parameter is important because it determines distortion of a finite amplitude wave propagating in the fluid. Moreover, it can be related to the molecular dynamics of the medium and it can to provide information about structural properties of medium, internal pressures, clustering, intermolecular spacing, etc. Importance of the B/A parameter increases with the development of high-pressure technologies. The thermodynamic method has been applied for determination of B/A parameter in diacylglycerol (DAG) oil as a function of pressure at various temperatures.

Słowa kluczowe:

Nonlinearity parameter B/A, Thermodynamic method, ultrasoniv velocity, high pressure,

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation
10p.
11.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Siegoczyński R.M., Ptasznik S., Ultrasonic investigation of physicochemical properties of liquids under high pressure, IUS 2013, IEEE International Ultrasonics Symposium, 2013-07-21/07-25, Praga (CZ), DOI: 10.1109/ULTSYM.2013.0414, Vol.1, pp.1626-1629, 2013

Streszczenie:

High pressure research of the physicochemical properties of liquids has been stimulated by the fast development of such technologies as biodiesel production, high-pressure food processing and conservation, modification of biotechnological properties. Monitoring and studying liquid viscosity and ultrasonic wave velocity in liquids as a function of pressure and temperature enable to evaluate many important physicochemical parameters of liquids. These methods allow also insight into the phenomena governing the microstructural modifications occurring in treated substances, i.e. phase transitions. The knowledge of physicochemical properties (e.g. density, relaxation time, internal pressure or free volume) of pressurized substances is essential for understanding, design and control of the process technology. Measurements were conducted on the example of diacylglycerol oil (DAG oil), that is an important constituent of oils and fats.

Słowa kluczowe:

Physicochemical parameters of liquids, high pressure, ultrasonic velocity, viscosity of liquids, DAG oil

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation Ptasznik S. - Air Force Institute of Technology (PL)
10p.
12.Kiełczyński P., Szalewski M., Balcerzak A., Malanowski A., Rostocki A.J., Application of the Bleustein-Gulyaev wave method for investigation of high-pressure phase transitions in diacylglycerol oil, IUS 2012, IEEE International Ultrasonics Symposium, 2012-10-07/10-10, Dresden (DE), DOI: 10.1109/ULTSYM.2012.0127, pp.511-514, 2012

Streszczenie:

Phase transitions in diacylglycerol (DAG) oil were investigated by using an ultrasonic method for measuring viscosity. Viscosity of DAG oil was measured over a wide range of hydrostatic pressures up to 500 MPa, and at temperatures ranging from 10 to 40 °C. The observed discontinuities in the viscosity versus pressure curves (isotherms) indicate phase transitions. An original ultrasonic method that uses the surface acoustic Bleustein-Gulyaev (B-G) wave was employed to measure the viscosity of DAG oil at high pressure range. This method allowed for fast and reliable measurement of DAG oil viscosity along various isotherms. Moreover, the kinetics of the observed phase transformations at various temperatures was analyzed.

Słowa kluczowe:

Viscosity, Temperature measurement, Ultrasonic variables measurement, Acoustics, Pressure measurement, Acoustic measurements, Liquids

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Malanowski A. - other affiliation Rostocki A.J. - Warsaw University of Technology (PL)
10p.
13.Kiełczyński P., Szalewski M., Balcerzak A., Inverse problem of the Love wave propagation in elastic waveguides loaded with a viscous liquid, IUS 2012, IEEE International Ultrasonics Symposium, 2012-10-07/10-10, Dresden (DE), DOI: 10.1109/ULTSYM.2012.0375, pp.1501-1504, 2012

Streszczenie:

The problem of propagation of Love waves in elastic waveguides loaded on the surface by a viscous (Newtonian) liquid is important in many applications such as geophysics, seismology, investigation of the physical properties of liquids. Love wave energy is concentrated near the waveguide surface, so that Love waves are especially suited to study the material properties of surface layers. In this work, the direct problem and the inverse problem of the Love wave propagation in a layered elastic waveguides loaded with a viscous liquid have been formulated and solved. The inverse problem relies on the determination of the material parameters (e.g., the unknown value of liquid viscosity) from measurements of the dispersion curves of Love waves.

Słowa kluczowe:

Liquids, Viscosity, Inverse problems, Surface waves, Dispersion, Linear programming, Liquid waveguides

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN
10p.
14.Kiełczyński P., Szalewski M., Balcerzak A., Rostocki A.J., Measurements of the viscosity of liquids in function of pressure and temperature using SH surface acoustic waves, IUS 2011, IEEE International Ultrasonics Symposium, 2011-10-18/10-21, Orlando (US), DOI: 10.1109/ULTSYM.2011.0129, pp.535-538, 2011

Streszczenie:

Triolein viscosity was measured at pressures from atmospheric up to 650 MPa and in the temperature range from 10° C to 40° C using ultrasonic measuring setup. Bleustein-Gulyaev SH surface acoustic waves waveguides were used as viscosity sensors. Application of SH surface acoustic waves in the liquid viscosity measurements at high pressure has many advantages. It enables viscosity measurement during phase transitions and in the high-pressure range where the classical viscosity measurement methods cannot operate. The knowledge of changes in viscosity in function of pressure and temperature can help to obtain a deeper insight into thermodynamic properties of liquids. Measurements of phase transition kinetics and viscosity of liquids at high pressures and various temperatures (isotherms) is a novelty.

Słowa kluczowe:

Temperature measurement, Viscosity, Liquids, Ultrasonic variables measurement, Acoustic measurements, Pressure measurement, Acoustics

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL)
10p.
15.Kiełczyński P., Szalewski M., Inverse determination of thickness and elastic properties of thin layers and graded materials using generalized Love waves, IUS 2010, IEEE International Ultrasonics Symposium, 2010-10-11/10-14, San Diego (US), DOI: 10.1109/ULTSYM.2010.5935480, Vol.1, pp.2235-2238, 2010

Streszczenie:

Determination of the mechanical and geometrical parameters of thin coatings and surface layers in materials is of great practical importance in engineering and technology. In this work the authors present a novel inversion procedure for simultaneous determination of thickness, shear elastic constant and density of thin coating layers in materials. The inversion procedure is based on measurements of the dispersion curve for Love surface acoustic waves. The inverse problem is formulated as an optimization problem with the appropriately designed objective function, depending on the material parameters of the coating layer, ultrasonic frequency, and the experimental data, i.e., measured phase velocity of the surface Love wave. The minimization of the objective function provides three parameters of a thin layer, i.e., its thickness, shear elastic constant and density. The agreement between the results of calculations with the proposed inversion method and the experimental data was good.

Słowa kluczowe:

Inverse problems, Dispersion, Surface waves, Substrates, Copper, Coatings

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN
10p.
16.Kiełczyński P., Szalewski M., Rostocki A.J., Zduniak M., Siegoczyński R.M., Balcerzak A., Investigation of High-Pressure Phase Transitions in Vegetable Oils by Measuring Phase Velocity of Longitudinal Ultrasonic Waves, IUS 2009, IEEE International Ultrasonics Symposium, 2009-09-20/09-23, Rzym (IT), DOI: 10.1109/ULTSYM.2009.5441766, pp.1563-1566, 2009

Streszczenie:

Monitoring and studying the pressure effect on liquid properties are becoming increasingly important in food, chemical, cosmetic and pharmaceutical industry as well as in laboratory practice. Accurate thermodynamic data in liquids as a function of pressure are required for studies the structure of liquids as well as for various engineering applications. Direct measurement of thermodynamic parameters is very difficult. The velocity of sound is related to many thermodynamic parameters and can be measured relatively simple. In this work the variation of sound velocity and isothermal compressibility with hydrostatic pressure for triolein is evaluated up to 650 MPa. During the measurement we stated the phase transformation of triolein and the presence of the hysteresis of the dependence of sound velocity on pressure. To the authors' knowledge, the measurement of the sound velocity of liquids under high pressure during the phase transition is the novelty. From the performed measurements it results that the dependence of sound velocity on pressure can be used to investigate phase transformations in natural oils.

Słowa kluczowe:

Vegetable oils, Velocity measurement, Phase measurement, Ultrasonic variables measurement, Thermodynamics, Liquids, Pressure measurement, Chemical industry, Monitoring, Pressure effects

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Zduniak M. - other affiliation Siegoczyński R.M. - other affiliation Balcerzak A. - IPPT PAN
10p.
17.Rostocki A.J., Siegoczyński R.M., Kiełczyński P., Szalewski M., High pressure changes of the castor oil viscosity by ultrasonic method, 21st AIRAPT/45th EHPRG International Conference on High Pressure Science and Technology, 2007-09-17/09-21, Pisa (IT), DOI: 10.1088/1742-6596/121/4/142009, Vol.121, pp.142009-1-4, 2008

Streszczenie:

The pressure change of viscosity of castor oil have been measured by ultrasonic method within the range of pressure up to 0.9 GPa. For the measurement, the authors have applied a new ultrasonic method based on Bleustein-Gulyaev (B-G) waves. For the lower pressures (up to 0.3 GPa) the results have been compared with earlier results obtained by falling body method, whereas for the higher pressure range results were compared with those obtained by the flow type viscometer. The measurements have shown: 1. Exponential rise of viscosity with pressure up to 0.4 GPa according to the Barus formula. 2. Extraordinary increment of viscosity at constant pressure during phase transition. 3. The decomposition of the high pressure phase during the decompression process have shown very large hysteresis of viscosity on pressure. 4. After the decompression process the viscosity lasts higher then a initial value for several hours.

Słowa kluczowe:

Bleustein-Gulyaev (B-G) waves, high pressure, phase transitions, viscosity measurements

Afiliacje autorów:

 Rostocki A.J. - Warsaw University of Technology (PL) Siegoczyński R.M. - other affiliation Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN
18.Siegoczyński R.M., Rostocki A.J., Kiełczyński P., Szalewski M., A viscosity measurement during the hight pressure phase transition in triolein, 21st AIRAPT/45th EHPRG International Conference on High Pressure Science and Technology, 2007-09-17/09-21, Pisa (IT), DOI: 10.1088/1742-6596/121/4/142010, Vol.121, pp.142010-1-5, 2008

Streszczenie:

The high-pressure properties of triolein, a subject of extensive research at the Faculty of Physics of Warsaw University of Technology (WUT) has been enhanced by the results of viscosity measurements within the pressure range up to 0.8 GPa. For the measurement the authors have adopted a new ultrasonic method based on Bleustein-Gulyaev waves, successfully developed earlier for the low pressures in the Section of Acoustelectronics of the Institute of Fundamental Technological Research. The measurements have shown: 1) Exponential rise of viscosity with pressure up to 0.5 GPa. 2) Extraordinary increment of viscosity at constant pressure during phase transition. 3) Further exponential rise of viscosity with pressure of the high-pressure phase of triolein. 4) The pressure exponents of the viscosity of both phases were different (the high-pressure phase had much smaller exponent). 5) The decomposition of the high-pressure phase due to the slow-decompression has shown very large hysteresis of viscosity on pressure dependence.

Słowa kluczowe:

Bleustein-Gulyaev (B-G) waves, high-pressure phase transitions, viscosity measurements, triolein

Afiliacje autorów:

 Siegoczyński R.M. - other affiliation Rostocki A.J. - Warsaw University of Technology (PL) Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN
19.Kiełczyński P., Szalewski M., Rostocki A.J., Gładysz J., Investigation of High-Pressure Phase Transitions in Castor Oil Using SH Surface Acoustic Waves, IUS 2008, IEEE International Ultrasonics Symposium, 2008-11-02/11-05, Beijing (CN), DOI: 10.1109/ULTSYM.2008.0533, Vol.1, pp.2154-2157, 2008

Streszczenie:

Measurement techniques for in-situ rheological investigations under high pressure allow insight into the phenomena governing the microstructural modifications. The conventional mechanical methods can not be operated to this aim due to their inherent limitations. This is why ultrasonic methods for the measurement of the viscosity of liquids under high pressure were introduced. To this end, the authors have applied new ultrasonic methods, i.e., the Love wave method and the Bleustein-Gulyaev (B-G) wave method. The measurements of the viscosity of liquid (castor oil) were carried out in function of hydrostatic pressure up to 800 MPa. During the measurement we stated the phase transformation of castor oil and the presence of the hysteresis of the dependence of viscosity on pressure. To the authors' knowledge, the measurement of the viscosity of liquids under high pressure during the phase transition and during the decompression process is the novelty.

Słowa kluczowe:

Petroleum, Surface acoustic waves, Acoustic waves, Pressure measurement, Viscosity, Ultrasonic variables measurement, Liquids, Phase measurement, Measurement techniques, Rheology

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL) Gładysz J. - other affiliation
20.Kiełczyński P., Pajewski W., Szalewski M., Layered Cylindrical Viscosity Sensors, IEEE International Ultrasonic Symposium, 2004-08-23/08-27, Montréal (CA), DOI: 10.1109/ULTSYM.2004.1418120, Vol.1, pp.1573-1576, 2004

Streszczenie:

The electro-elastic behavior of a viscoelastically loaded layered cylindrical resonator comprising of two coupled hollow cylinders is presented. The inner cylinder is piezoelectric. The outer cylinder is a non-piezoelectric (passive) metallic cylinder. Analytical formulas for the elements of the impedance matrix Z of a cylindrical piezoelectric resonator vibrating in a shear mode are established. Moreover, analytical formulas for the electrical admittance of a compound layered cylindrical resonator loaded with a viscoelastic liquid are established. Admittance diagrams obtained using: (1) a continuum electromechanical model; and (2) the elements of the impedance matrix Z are exactly the same. The analysis presented in this paper can be utilized for the design and construction of cylindrical piezoelectric viscosity sensors, annular accelerometers, filters, transducers and multi-layer resonators.

Słowa kluczowe:

Viscosity, Elasticity, Chemical sensors, Piezoelectric materials, Admittance, Surface impedance, Mechanical sensors, Equations, Electromechanical sensors, Accelerometers

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Pajewski W. - IPPT PAN Szalewski M. - IPPT PAN
21.Kiełczyński P., Pajewski W., Szalewski M., Impedance Matrix and its Use for Modeling Axially Polarized Piezoceramic Cylindrical Resonators, IEEE International Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003-05-04/05-08, Tampa (US), DOI: 10.1109/FREQ.2003.1275188, Vol.1, pp.757-760, 2003

Streszczenie:

Analytical formulas for the elements of the impedance matrix Z of a cylindrical piezoelectric resonator vibrating in a shear mode are established. The input impedance was calculated employed the established elements of the impedance matrix Z. The analysis presented in this paper can be utilized for the design and construction of the cylindrical piezoelectric sensors, transducers and multi-layer resonators.

Słowa kluczowe:

Surface impedance, Piezoelectric materials, Ceramics, Vibrations, Equations, Electromechanical sensors, Piezoelectric transducers, Mechanical sensors, Piezoelectric polarization, Viscosity

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Pajewski W. - IPPT PAN Szalewski M. - IPPT PAN

##### Abstrakty konferencyjne
1.Kiełczyński P., Ptasznik S., Kalinowski A., Investigation of high-pressure thermophysical parameters of edible oils using ultrasonic methods, 26th International Scientific Conference Progress in Technology of Vegetable Fats , 2018-06-06/06-08, Smardzewice (PL), pp.31-32, 2018

Streszczenie:

The presentation includes an overview of the ultrasonic methods used to investigate the thermophysical properties of edible oils in the high pressure range. Using ultrasonic waves we can determine (relatively easily) a number of physicochemical parameters of edible oils in the range of high pressures. On the other hand, the determination of these high pressure parameters using classical measurement methods (e.g., calorimetry, Fourier transform infrared spectroscopy) is very difficult, practically impossible. The basic ultrasonic measurements are measurements of velocity and attenuation of the ultrasonic wave. A brief description of the properties and parameters describing ultrasonic waves will be presented. The most important thermophysical parameters of oils include: 1) adiabatic and isothermal compressibility; 2) thermal expansion coefficient; 3) specific heat at constant pressure 4) surface tension; 5) viscosity, 6) thermal pressure coefficient and 7) thermal conductivity. The knowledge of these physicochemical parameters of oils high pressures for various temperature values is essential in the design and optimization of high-pressure technological processes of food preservation and food processing. Particularly difficult (using classical measurement methods) is to measure the viscosity of oils under high pressure. The application of the ultrasonic surface wave method of Love or Bleustein-Gulyaev type (developed at the Institute of Fundamental Technological Research of the Polish Academy of Sciences) solves this problem, allowing determination of oil viscosity for pressures above 200 MPa (up to 800 MPa). An interesting phenomenon that we can investigate by ultrasonic methods are the high-pressure phase transitions in edible oils. Using ultrasonic methods, high pressure phase transformations in many edible oils (e.g., in olive oil, in rapeseed oil, and in Camelina sativa oil) were detected and investigated. Camelina sativa oil is a very promising raw material for the production of biofuels. It is practically impossible to investigate these high pressure phase transformations in edible oils using classical measurement methods. Application of ultrasonic measurement methods enables the investigation of the physicochemical properties of edible oils (liquids) under high pressure.

Słowa kluczowe:

Thermophysical parameters, ultrasonic methods, edible oils, high-pressure

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Ptasznik S. - Air Force Institute of Technology (PL) Kalinowski A. - Institute of agricultural and food biotechnology (PL)
2.Kiełczyński P., Badanie parametrów fizykochemicznych olei roślinnych metodami ultradźwiękowymi w zakresie wysokich ciśnień, BEMS 2018, XVIII Konferencja Naukowo-Techniczna Budowa i Eksploatacja Maszyn Przemysłu Spożywczego, 2018-09-04/09-07, Koszalin-Ustronie Morskie (PL), pp.59-59, 2018

Streszczenie:

Słowa kluczowe:

Prędkość dźwięku, parametry fizykochemiczne, wysokie ciśnienia, oleje roślinne

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN
3.Kiełczyński P., Ptasznik S., Szalewski M., Balcerzak A., Wieja K., Rostocki A., What Information about High-Pressure Thermophysical Properties of Liquids Can be Provided by Low-Intensity Ultrasonic Waves? , IUS 2018, IEEE International Ultrasonics Symposium, 2018-10-22/10-25, KOBE (JP), pp.995-995, 2018

Streszczenie:

The aim of this work was to evaluate the impact of temperature and high pressure on thermophysical properties of liquids, exemplified by a Camelina sativa (false flax) oil. Camelina sativa oil has gained recently a growing interest due to its health-promoting effect as well as for its potential use in biodiesel production. To achieve the above objective, we measured the speed of sound and density in the selected oil. The speed of sound is directly associated to many thermophysical parameters of liquids. Hence, measurements of ultrasonic longitudinal wave velocity (f = 5 MHz) and liquid density, as a function of pressure and temperature, allowed determination of several important thermophysical parameters of the investigated liquid. The speed of sound in the liquid was determined from the time of flight measured with the cross-correlation method. To perform numerical calculations, it was helpful to introduce a Tammann–Tait type equation of state to approximate the measured density isotherms of the investigated Camelina sativa oil.

Słowa kluczowe:

Speed of sound, high pressure, cross-correlation method, thermophysical parameters, Camelina sativa oil

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Ptasznik S. - Air Force Institute of Technology (PL) Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A. - Warsaw University of Technology (PL)
4.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., Love waves propagation in elastic waveguides loaded by viscoelastic media, SolMech 2018, 41st SOLID MECHANICS CONFERENCE, 2018-08-27/08-31, Warszawa (PL), pp.240-241, 2018

Streszczenie:

It is very important from a practical point of view, to develop new and accurate methods of measuring the rheological parameters (viscosity η, elasticity μ and density ρ) of plastics and polymers. New materials require new methods of measuring their rheological parameters. To evaluate the rheological parameters of plastics so far mechanical methods are used. These methods are cumbersome, outdated and destructive. The use of SH (Shear Horizontal) surface Love waves, to evaluate rheological parameters of polymers, does not possess these disadvantages. The objective of this work is to establish a mathematical model of propagation of Love waves in layered elastic waveguides covered on their surface with viscoelastic materials described by different viscoelastic models, i.e., Kelvin-Voigt, Newton and Maxwell models. To this end, we developed a complex dispersion equation for Love waves propagating in loaded waveguides and performed numerical calculations.

Słowa kluczowe:

Viscoelasticity, Love waves, Kelvin-Voigt model, Maxwell model, Complex dispersion equation

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
5.Kiełczyński P., Love Surface Wave Biosensors, 12th TOIN International Symposium on Biomedical Engineering, 2017-11-11/11-11, Yokohama (JP), pp.21-23, 2017

Streszczenie:

In this presentation I will address a fascinating example of a beneficiary interdisciplinary research. To be more specific, I will consider mutual interactions between the biosensor technology and seismology, two vital domains of research with huge practical importance in the life of modern Japanese society. I would like to convey a message that developments made in one scientific (engineering) domain can be very useful in another field of research, and vice-versa. Such mutual influence of different branches of science (engineering) can significantly accelerate progress in the considered domains of R&D activities. In this presentation I will focus on one type of acoustic (ultrasonic) sensors, i.e., those employing Love surface waves, first discovered in seismology in 1911 by the British mathematician A. E. H. Love. Since the ultrasonic sensors employing Love surface waves emerged some 80 years later, in the paper published by the author in 1989, it is not surprising that many theoretical and experimental techniques were first developed in seismology and then transferred to the sensor technology. The mathematical formalism describing seismic Love waves and those used in biosensor technology is in principle the same, i.e., it uses the theory of the Sturm-Liouville problem, deeply rooted in functional analysis, in particular the spectral theory of compact operators and Hilbert space. Seismic Love waves can travel thousands of kilometers around the surface of the Earth and have the frequency range ~0.01-10 Hz. On the other hand, those used in biosensor technology are of much higher frequencies (~50-500 MHz) but travel accordingly shorter distances (~5-50 mm) in man-made waveguides. It should be noticed that seismic Love surface waves are main contributors to devastating consequences in aftermath of earthquakes. On the other hand, Love wave biosensors offer a unique possibility for measurements of a large number of very important properties of biological materials.

Słowa kluczowe:

Love waves, Sensors, Biosensors, Chemosensors, Viscosity sensors

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN
6.Kiełczyński P., Application of ultrasonic methods for the investigation of physicochemical parameters of edible oils, 25th Jubilee International Scientific Conference, Progress in Technology of Vegetable Fats, 2017-05-31/06-02, Rynia (PL), pp.37-38, 2017

Streszczenie:

The presentation includes an overview of the ultrasonic methods used to investigate the physicochemical properties of edible oils in the high pressure range.
Using ultrasonic waves we can determine (relatively easily) a number of physicochemical parameters of edible oils in the range of high pressures.
On the other hand, the determination of these high pressure parameters using classical measurement methods (e.g., calorimetry, IRF spectroscopy) is very difficult, practically impossible. The knowledge of these physicochemical parameters of oils is important due to the increasingly widespread use of high-pressure food preservation and processing methods.
The most important physicochemical parameters of oils include: 1) adiabatic and isothermal compressibility; 2) thermal expansion coefficient; 3) specific heat at constant pressure 4) surface tension; 5) viscosity and 6) thermal pressure coefficient. The knowledge of these physicochemical parameters of oils high pressures for various temperature values is essential in the design and optimization of high-pressure technological processes of food preservation and food processing.
Particularly difficult (using classical measurement methods) is to measure the viscosity of oils under high pressure. The application of the ultrasonic surface wave method of Love or Bleustein-Gulyaev type (developed at the Institute of Fundamental Technological Research of the Polish Academy of Sciences) solves this problem, allowing determination of oil viscosity for pressures above 200 MPa.
An interesting phenomenon that we can investigate by ultrasonic methods are the high-pressure phase transitions in edible oils. Using ultrasonic methods, high pressure phase transformations in many edible oils (e.g., in olive oil, in rapeseed oil, and in camelina sativa oil) and in their components, such as TAG (triacylglycerol) and DAG (diacylglycerol), were detected and investigated.
It is practically impossible to investigate these high pressure phase transformations in edible oils using classical measurement methods. Numerous documented advantages of ultrasonic methods in the high pressure range were the motivation to perform the presented study.

Słowa kluczowe:

Ultrasonic methods, Physicochemical properties of oils

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN
7.Kiełczyński P., Szalewski M., Balcerzak A., Wieja K., The influence of rheological parameters of viscoelastic liquids on the propagation characteristics of ultrasonic Love waves, IUS 2017, IEEE International Ultrasonics Symposium, 2017-09-06/09-09, Washington, DC (US), pp.415, 2017

Streszczenie:

Progress in materials engineering has led to development of new materials with improved functional characteristics. One of the new types of
materials introduced into industrial practice are plastics and polymers. These materials exhibit rheological (viscoelastic) properties, which combine
simultaneously the properties of liquids and solids. Due to their attractive features, such as low specific weight, high resistance to chemical agents,
cost effectiveness etc. these materials are widely used in chemical, automotive, aviation and space industry. Thus, it is very important to develop
new, robust and accurate methods to measure the rheological parameters (viscosity η, elasticity μ and density ρ) of plastics and polymers. The
conventional mechanical methods used so far to this end are outdated, time consuming, and cumbersome. To overcome this problems, the authors
propose the use of ultrasonic methods that employ surface Love waves, what is a novelty.

Słowa kluczowe:

Love waves, Rheological parameters, Rheological models, Polymers

Afiliacje autorów:

 Kiełczyński P. - IPPT PAN Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN
8.Kielczynski P., Ptasznik S., Szalewski M., Balcerzak A., Wieja K., Rostocki A.J., Investigation of regular and anomalous behavior of liquid media under high pressure using ultrasonic methods, IUS 2017, IEEE International Ultrasonics Symposium, 2017-09-06/09-09, Washington, DC (US), pp.417, 2017

Streszczenie:

Background, Motivation and Objective
In many industrial technological processes, liquids are subjected to high pressures, e.g., in the high pressure food preservation. Similarly, in modern fuel
injection systems for diesel engines, biofuel is subjected to a pressure up to 300 MPa. In such conditions, in liquids, phase transitions can occur that
substantially increase the density and liquid viscosity. This can be very detrimental for the engine or the technological equipment. Thus, it is important to
determine at what pressures and temperatures phase transitions occur. Conventional mechanical methods for measuring physicochemical properties of
liquids at these extreme conditions do not operate. By contrast, ultrasonic techniques are very suitable for measurements of physicochemical properties of
liquids at high pressure, since they are non-destructive and can be fully automated. The aim of this work is to study the high-pressure physicochemical
properties of liquids (exemplified by a camelina sativa - false flax oil) using novel ultrasonic methods.

Słowa kluczowe:

High pressure, Biofuels, Viscosity, Phase transitions

Afiliacje autorów:

 Kielczynski P. - IPPT PAN Ptasznik S. - Air Force Institute of Technology (PL) Szalewski M. - IPPT PAN Balcerzak A. - IPPT PAN Wieja K. - IPPT PAN Rostocki A.J. - Warsaw University of Technology (PL)