부산대학교 도서관

Unsteady MHD free convention isothermal vertical plate in a porous medium with radiation effect has been studied numerically. Implicit finite different technique is use as the main tool for the numerical approach. Numerical solutions for the effects of radiation on a MHD convective heat transfer past a semi-infinite porous plate with a magnetic field are obtained. It is assumed that the porous plate moves with a constant velocity in the direction of fluid flow, and the free stream velocity follows the exponentially increasing small numerical law. The magnetic field acts perpendicular to the porous surface which absorbs the fluid with a suction velocity varying with time. The governing equations for the flow are transformed into a system of nonlinear ordinary differential equations by implicit finite difference technique and then are solved numerically by using the numerical method. 'A representative set of computational results for the velocity, temperature and concentration profiles as well as Local skin-friction coefficient, Local Nusselt number and Local Sherwood number are presented graphically for various governing parameters such as Magnetic parameter, Reynolds number, Ecart, Schmidt number, and Kinamatics. In the present analysis various comparisons with previously published work are performed and the results are found to be in a good agreement. Keywords: Isothermal, free convective, thermal radiation, Mass fluxes, heat generating.
Nomenclatures MHD Magneto-hydrodynamic Pr. Prandtl number v. Ratio of kinematics viscosity Sc. Schmidt number D. Coefficient of mass diffusion Gr. Grashof number d. Radiactive heat flux Ec Dissipation parameter k [...]