Institute of Fundamental Technological Research
Polish Academy of Sciences


P.Z. Bar-Yoseph

Technion-Israel Institute of Technology (IL)

Recent publications
1.  Gelfgat A.Yu., Bar-Yoseph P.Z., Solan A., Kowalewski T.A., An axisymmetry-breaking instability of axially symmetric natural convection, INTERNATIONAL JOURNAL OF TRANSPORT PHENOMENA, ISSN: 1028-6578, Vol.1, No.3, pp.173-190, 1999

The three-dimensional instability of an axisymmetric natural convection flow is investigated numericaUy using a global spectral Galerkin method. The linear stability problem separates for different azimuthal modes. This aUowsus to reduce the problem to a sequence of 2D-like problems. The formulation of the numerical approach and several test calculations are reported. The numerical results are successfully compared with an experiment on natural convection of water in a vertical cylinder, which shows an axisymmetry-breaking instability with a high azimuthal wavenumber.

Axisymmetry-breaking instability, natural convection, global Galerkin method

Gelfgat A.Yu. - Technion-Israel Institute of Technology (IL)
Bar-Yoseph P.Z. - Technion-Israel Institute of Technology (IL)
Solan A. - Technion-Israel Institute of Technology (IL)
Kowalewski T.A. - IPPT PAN

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