Radiation Absorption Effects on Unsteady MHD Flow of Radiative and Chemically Reacting Fluid Past a Porous Plate with Variable Suction and Concentration

This paper focuses on the effects of chemical reaction and radiation absorption, on unsteady MHD free convection fluid flow, embedded in a porous medium with time dependent suction and temperature gradient heat source, in two different cases of boundary conditions. Case (I): u = u , = 1+ ent , C = 1+ ent at y = 0 p q e e u®0, q ®0, C®0 as y®¥ Case (II): u = 1+ e , = 1+ e , C = 1+ e at y = 0 e nt q e nt e nt u®0, q ®0, C®0 as y®¥ The parabolic partial differential equations governing the fluid flow, heat transfer and mass transfer have been solved, by using the perturbation technique. The velocity, temperature, concentration, skin friction coefficient, rate of heat transfer and rate of mass transfer at the plate are presented in graphs, and the effects of various physical parameters like Prandtl number Pr, thermal Grash of number Gr, mass Grash of number Gm, Schmidt number Sc, chemical reaction parameter Kr, magnetic field parameter M, thermal radiation parameter Nr, Radiation absorption parameter R and heat source parameter Qon the above flow quantities are analyzed and the results obtained are physically interpreted.