buoyancy-driven radiative unsteady magnetohydrodynamic heat transfer over a stretching sheet with non-uniform heat source/sink

In the present study an unsteady mixed convection boundary layer flow of an electrically conduct- ing fluid over an stretching permeable sheet in the presence of transverse magnetic field, thermal radiation and non-uniform heat source/sink effects is investigated. the unsteadiness in the flow and temperature fields is due to the time-dependent nature of the stretching velocity and the surface temperature. both opposing and assisting flows are considered. the dimensionless governing or- dinary non-linear differential equations are solved numerically by applying shooting method using runge-kutta-fehlberg method. the effects of unsteadiness parameter, buoyancy parameter, thermal radiation, eckert number, prandtl number and non-uniform heat source/sink parameter on the flow and heat transfer characteristics are thoroughly examined. comparisons of the present results with previously published results for the steady case are found to be excellent.