• TRANSPIRATION EFFECT ON UNSTEADY FREE CONVECTION THROUGH POROUS MEDIUM OF FLUCTUATING PERMEABILITY WITH CONSTANT HEAT AND MASS FLUX

Abstract

An analysis of the effect of transpiration on unsteady two dimensional free convection and mass transfer flow of a viscous incompressible electrically conducting fluid through a porous medium of fluctuating permeability bounded by a vertical infinite plane surface with constant suction velocity and constant heat and mass flux in the presence of a uniform magnetic field and a heat source/sink is presented. The permeability of the porous medium fluctuates in time about a constant mean. We have evaluated the velocity distribution u, fluctuating part of velocity profile Mr, Mi and the skin friction at the plate by using the perterbation technique. We have investigated the effects of M (Hartmann No.), Ko (Porosity Parameter) and So (Thermal Diffusion Parameter) on velocity, concentration and skin friction with the help of Graphs.