MHD free convection transient flow through porous medium in a vertical channel

The present study deals with the effect of uniform transverse magnetic field on free convection transient flow of an incompressible, electrically conducting, viscous liquid through a porous medium confined in a vertical channel when a wall of the channel suddenly starts to move along the flow of fluid with uniform velocity in its own plane while the other is at rest. The velocity field, temperature field, skin-friction and rate of heat transfer have been obtained following Laplace transform technique. The effects of magnetic parameter, porosity parameter and time parameter on velocity and skin-friction are discussed. The problem of Jha has been deduced as a particular case of the present study. (author)