Soret effects in ternary systems heated from below

We have investigated the stability of an horizontal liquid layer heated from below, in the Rayleigh-Bénard configuration, on a water-isopropanol-ethanol mixture. Neglecting the cross-diffusional effects, we have developed a linear stability analysis of the rest state and compared it with experiments...

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Bibliographic Details
Published in:	International journal of heat and mass transfer Vol. 40; no. 3; pp. 545 - 555
Main Authors:	Larre, J.P., Platten, J.K., Chavepeyer, G.
Format:	Journal Article
Language:	English
Published:	Oxford Elsevier Ltd 01-02-1997 Elsevier
Subjects:	Buoyancy-driven instability Exact sciences and technology Fluid dynamics Fundamental areas of phenomenology (including applications) Hydrodynamic stability Physics Soret effect Phenomenological model Rayleigh-Benard instability Convective instabilities Experimental study Density Temperature fluctuation Heat transfer Ternary mixtures
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Summary:	We have investigated the stability of an horizontal liquid layer heated from below, in the Rayleigh-Bénard configuration, on a water-isopropanol-ethanol mixture. Neglecting the cross-diffusional effects, we have developed a linear stability analysis of the rest state and compared it with experiments. We did not find sufficient agreement. However, incorporating the cross-diffusion in the theory, it is possible to recover the critical parameters for the onset of convection.
ISSN:	0017-9310 1879-2189
DOI:	10.1016/0017-9310(96)00125-1