DUFOUR AND SORET EFFECTS ON UNSTEADY MHD FREE CONVECTIVE FLOW OF VISCOUS INCOMPRESSIBLE FLUID PAST AN INFINITE VERTICAL POROUS PLATE IN THE PRESENCE OF RADIATION

In this paper, the Dufour and Soret effects on an unsteady MHD free convection flow of an incompressible, electrically conducting viscous Newtonian fluid past an infinite vertical porous plate have been studied, taking into account Viscous and Darcy resistance terms and constant permeability of the medium in the presence of radiation. The fluid is considered as a gray, absorbing-emitting but non-scattering medium. The Rosseland approximation in the energy equation is used to describe the radiative heat flux for optically thick fluid. The dimensionless governing equations for this investigation are solved numerically using Galerkin finite element method. The influence of the physical parameters involved in the problem under investigation on the velocity, temperature and concentration profiles within the boundary layer are presented through the graphs and tabulated results for the skin-friction coefficient, Nusselt and Sherwood numbers.