Finite difference solution of radiation effects on MHD unsteady free-convection flow over vertical porous plate

摘要

The effect of radiation on magnetohydrodynamic (MHD) unsteady free-convection flow past a semi-infinite vertical porous plate in the presence of transversal uniform magnetic field has been analyzed. By means of an implicit finite-difference method the boundary layer equations are transformed into a linear algebraic system. The effect of radiation, magnetic, Prandtl number and suction (or injection) parameters have been studied. The numerical results reveal that the radiation has significant influences on the velocity and temperature profiles, skin friction and Nusselt number. The results indicate that the velocity, temperature, local and average skin friction increase as the radiation parameter increases. While the local and average Nusselt numbers decrease as the radiation parameter increases.