MIXED CONVECTIVE HEAT AND MASS TRANSFER MHD FLOW PAST AN UNSTEADY STRETCHING SHEET WITH INTERNAL HEAT GENERATION, VISCOUS DISSIPATION, INTERNAL MASS DIFFUSION INCLUDING SORET AND DOFOUR EFFECTS

Mixed two dimensional convection heat and mass transfer flow with suction, viscous dissipation, heat source/sink effect, mass diffusion including Soret and Dufour effects due to an unsteady porous stretching sheet is studied in the present analysis. The flow is subjected to magnetic field normal to the vertical plate in a saturated porous medium. The governing non-linear partial differential equations have been reduced to ordinary differential equations using suitable similarity transformation variables. The resultant equations which are coupled and highly nonlinear are solved by standard Runge-Kutta fourth order numerical technique via shooting method. The momentum, temperature and concentration field distributions are analyzed and discussed numerically and presented pictorially through graphs. Numerical values for skin friction coefficient, local Nusselt number and Sherwood number at the plate in the presence of magnetic field and porous medium are derived and discussed for various values of physical parameters and are presented in table. Finally the present results are compared with previously published results and found to be well in agreement.