Effects of MHD and thermal radiation on forced convective flow over a porous plate embedded in a porous medium

摘要

This study investigates the magnetic and radiation effects on forced convection heat transfer along a porous plate embedded in a porous medium. The fluid is assumed to be incompressible. The velocity and temperature distributions inside the boundary layer has been considered as a simple polynomial functions and the Governing Principle of Dissipative Processes (GPDP) is formulated. The Euler-Langrange equations are reduced to coupled polynomial equations in terms of boundary layer thicknesses. The effect of the Magnetic parameter (ξ), Prandtl number Pr, Parameter of the Porous medium k_1, Radiation parameter N and Suction/injection parameter H on the velocity and temperature profiles as well as on the local skin friction and local heat transfer parameters. For some specific values of the governing parameters, the results agree very well with those available in the literature. The present study establishes high accuracy of results obtained by this variational technique.