SoretDufour driven instability in binary fluids
Abstract
The mechanism of thermal diffusion in a binary fluid under nonisothermal conditions is analyzed. In such a system, the fluid density is a function of temperature and molefraction of the components. The process of heat conduction and mass diffusion takes place at different rates, and thus the system is liable to exhibit spontaneous convection. Since each of the heat and mass fluxes has a significant influence on the other driving force, the two crossdiffusion effects may be of importance. These crossdiffusion effects are due to thermal diffusion (Soret effect) and the diffusionalthermo (Dufour effect) processes in the system. The system investigated is a transverse finite horizontal thin fluid boundary layer with free upper boundary and subjected to thermal and mass gradients. The Soret and Dufour effects on the stability of the system are studied.
 Publication:

Zeitschrift Angewandte Mathematik und Mechanik
 Pub Date:
 1988
 DOI:
 10.1002/zamm.19880681218
 Bibcode:
 1988ZaMM...68..645S
 Keywords:

 Binary Fluids;
 Convective Flow;
 Flow Stability;
 Hydrodynamic Equations;
 Boundary Layer Flow;
 Density Distribution;
 Flow Equations;
 Fluid Mechanics and Heat Transfer