Vol. 3, Issue 1, Part G (2017)

Abstract
In the present paper unsteady hydromagnetic convective flow of micropolar fluid along a semi-infinite vertical porous plate is studied with effects of radiation and heat source/sink. The porous plate is embedded in non-homogeneous porous medium and subjected to a variable suction/injection in slip flow regime taking into account the effects of radiation and heat source/sink. The plate is subjected to variable suction/injection in slip flow regime. The suction/injection on the plate and the permeability of the porous medium decreases exponentially with time. Rosseland approximation is used to describe the radiative heat flux. The solutions for the velocity of the fluid, micro-rotation velocity and temperature field are obtained by regular perturbation technique. Expressions for the skin-friction and the rate of heat transfer are also derived. The effects of permeability parameter, couple stress, Prandtl number and other parameters entering into the problem are shown graphically and discussed numerically.