The objective of the present study is to investigate the effects of chemical reaction and radiation on unsteady MHD free convection fluid flow embedded in a porous medium with time dependent suction and temperature gradient heat source. The problem has been solved and obtained solutions for velocity, temperature, concentration, skin friction coefficient, rate of heat transfer and rate of mass transfer using perturbation technique in two different cases namely Case (I): Flow past a stationary plate with variable temperature and concentration. Case (II): Flow past a moving plate with variable temperature and concentration. The effects of various parameters such as Prandtl number Pr, thermal Grashof number Gr, mass Grashof number Gm, Schmidt number Sc, chemical reaction parameter Kr, magnetic field parameter M, thermal radiation parameter Nr and heat source parameter Q are discussed in detail through graphs and tables .
Unsteady, MHD, Free convection, Porous medium