Institute of Fundamental Technological Research
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A. Sankaran


Recent publications
1.  Sankaran A., Pawłowska S., Pierini F., Kowalewski T.A., Yarin A.L., Dynamics of electrospun hydrogel filaments in oscillatory microchannel flows: a theoretical and experimental approach, PHYSICS OF FLUIDS, ISSN: 1070-6631, DOI: 10.1063/5.0011005, Vol.32, No.7, pp.072008-1-13, 2020

Abstract:
The dynamics of highly flexible micro- and nano-filaments are important to a variety of biological, medical, and industrial problems. The filament configuration variation and cross-stream migration in a microchannel are affected by thermal fluctuations in addition to elastic and viscous forces. Here, hydrogel nano-filaments with small bending Young's moduli are utilized to elucidate the transitional behavior of elastic Brownian filaments in an oscillatory microchannel flow. A numerical model based on chain elastic dumbbells similar to the Rouse-Zimm model accounting for elastic, viscous, and random Brownian forces is proposed and implemented. In addition, a theoretical model to describe the average orientation–deformation tensor evolution for an ensemble of filaments in an oscillatory flow is proposed. The results are compared with the evolution observed in the experiments.

Affiliations:
Sankaran A. - other affiliation
Pawłowska S. - IPPT PAN
Pierini F. - IPPT PAN
Kowalewski T.A. - IPPT PAN
Yarin A.L. - Technion-Israel Institute of Technology (IL)

Category A Plus

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