MHD Convective Boundary Layer Flow and Heat Transfer Past a Stretching Porous Wall Embedded in a Porous Medium

摘要

Magnetohydrodynamics (MHD) convective boundary layer flow and heat transfer through a porous medium caused by stretching a porous wall embedded in a porous medium in the presence of a heat source/sink and under the influence of a uniform magnetic field has been studied. Exact solutions of the basic equations of momentum and energy are obtained after reducing them into non-linear ordinary differential equations. The Kummer's function method has been used to solve the energy equation. The effects of the flow parameters such as suction parameter(N), magnetic parameter(M), permeability parameter(Kp), wall temperature parameter(S) and heat source/sink parameter(Q) on the dynamics are discussed. It is observed that the suction parameter appears in the boundary condition ensuring the variable suction at the surface. Transverse component of the velocity increases only when magnetic field strength exceeds certain value but the thermal boundary layer thickness increases for all values. Results presented in this paper are in good agreement with the work of previous author and also in conformity with the established theory.