MHD Mixed Convection Flow of a Micropolar Fluid Past a Wedge Fixed in a Fluctuating Free Stream and Surface Temperature

Abstract

The flow and heat transfer on the unsteady laminar mixed convection boundary layer in a micropolar fluid past a vertical wedge have been
studied taking into account the effect of magnetic field. We assume that the free stream velocity and surface temperature oscillate in magnitude
but not in the direction of the oncoming flow velocity. The governing equations have been solved numerically by using the straight forward
finite difference method. The amplitudes of skin friction and couple stress are found to be significantly dependent on the Richardson’s number,
Ri, the magnetic parameter, M, and the vortex viscosity parameter, K. We observe that the amplitudes of skin friction and couple stress
increases owing to an increase of the Richardson’s number, Ri, while these become lower for the higher value of the magnetic parameter, M,
and the vortex viscosity parameter, K. Also the results demonstrate that the effects of the parameters on the amplitudes of heat transfer are
rather weak.