TRANSIENT FREE CONVECTIVE MHD FLOW AND CHEMICAL REACTION OVER A VERTICAL PLATE IN SLIP-FLOW REGIME

摘要

The paper considers the twin effects of chemical reaction as well as a uniform externally applied magnetic filed on the transient free convection and mass transfer flow of an electrically conducting, viscous, incompressible fluid, past an infinite vertical porous plate in slip-flow regime. The plate is subjected to a variable section velocity. Adopting a perturbative series expansion about a small parameter, e, expressions are obtained describing the velocity, temperature, skin-friction coefficient and the rate of mass transfer. The effects of governing parameters on the flow variables are discussed quantitatively with the aid of graphs for the velocity and concentration as well as the fluctuating parts of skin-friction. Our results show that the chemical reaction decreases the fluid velocity as well as species concentration, but this behaviour of chemical reaction rises the phase of skin-friction.