Thermo-Diffusion and Diffusion –Thermo Effects on Convective Heat and Mass Transfer through a Porous Medium in a Circular Cylindrical Annulus with Quadratic Density Temperature Variation – Finite Element Study

In this paper the heat and mass transfer characteristics of mixed convection about a circular cylindrical annulus in a porous medium, by taking into account the thermo-diffusion (soret) and diffusion –thermo (dufour) effects have been analyzed. the governing partial differential equations are transformed into a set of coupled ordinary differential equations, which are evaluated numerically by using a finite element method. the velocity, temperature and concentration profiles are presented graphically for various values of the parameters entering in to the problem. the nusslet number, sherwood number and shear stress are summarized in tabular form.