Convective Patterns in Binary Fluid Mixtures with Positive Separation Ratios

Details Convective Patterns in Binary Fluid Mixtures with Positive Separation Ratios Convective Patterns in Binary Fluid Mixtures with Positive Separation Ratios

2006-08-29

arxiv.org/abs/physics/0608280v1

Lecture Notes in Physics 584, Thermal nonequilibrium phenomena in fluid mixtures, ed. W. Koehler and S. Wiegand, p 334 - 354 (

Physics

Fluid Dynamics

21 pages, 8 figures

Scientific paper

We summarize our findings about laterally periodic convection structures in binary mixtures in the Rayleigh-Benard system for positive Soret effect. Stationary roll, square, and crossroll solutions and their stability are determined with a multimode Galerkin expansion. The oscillatory competition of squares and rolls in the form of crossroll oscillations is reviewed. They undergo a subharmonic bifurcation cascade where the oscillation period grows in integer steps as a consequence of an entrainment process.

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