THERMAL-DIFFUSION AS WELL AS TRANSPIRATION EFFECTS ON MHD FREE-CONVECTION AND MASS-TRANSFER FLOW PAST AN ACCELERATED VERTICAL POROUS PLATE

An unsteady free convection and mass transfer flow of a viscous, incompressible and electrically conducting fluid past a moving infinite vertical porous plate is studied taken into account the thermal diffusion effect. Similarity equations of the momentum, energy and concentration equations are derived by introducing a time dependent length scale. The suction velocity is taken to be inversely proportional to the above length scale. The energy and concentration equations are solved analytically. But due to the complexity of the momentum equation, it is solved numerically by the method of superposition. The effects of the magnetic parameter, the Grashof number, the modified Grashof number, the Soret number and the transpiration parameter on the velocity are shown graphically and thereafter discussed. Finally, the corresponding skin-friction is shown in tabular form.