• FINITE ELEMENT ANALYSIS OF THERMO-DIFFUSION AND DIFFUSION-THERMO EFFECTS ON COMBINED HEAT AND MASS TRANSFER FLOW OF VISCOUS, ELECTRICALLY CONDUCTING FLUID THROUGH A POROUS MEDIUM IN A VERTICAL CHANNEL

C. Sulochana, Tayappa H.*

Abstract


In this paper we study the effects of thermo-diffusion and diffusion-thermo on non-Darcy convective heat and mass transfer flow of a viscous, electrically conducting fluid through a porous medium in a vertical channel whose walls are maintained at constant temperature and concentration. The porous medium is assumed to be isotropic and homogeneous with constant porosity and effective thermal diffusivity. The thermo physical properties of the solid and fluid have been assumed to be constant except for the density variation in the body force term and the solid properties and the fluid are considered to be in the thermal equilibrium. The non-linear coupled equations have been solved by a finite element technique with three nodded line segments. The rate of heat transfer reduces with Schmidt parameter in heating case and enhances in the cooling case at both the walls. The rate of mass transfer with respect to Soret parameter reduces in the heating case and enhances in the cooling case.


Keywords


Soret effect, Dufour effect, MHD, Porous medium, Vertical channel, Finite element technique.

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