Abstract

The Soret coefficient of a binary mixture can be measured indirectly by considering its effect on the hydrodynamics induced by free convection. In this paper, we have analyzed the stability of two configurations commonly used for such measurements, the thermogravitational column and the Bénard cell. We have numerically integrated the three-dimensional partial differential equations that describe these systems in order to provide accurate data of stability boundaries suitable for comparison with experimental measurements.

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