Mixed convection boundary layer flow over a stretching vertical sheet in a thermally stratified fluid

The steady mixed convection boundary layer flow through a stable stratified medium over a stretching vertical sheet is investigated. The velocity of the stretching sheet, the surface temperature and the ambient temperature are assumed to vary linearly with the distance from the leading edge. The transformed ordinary differential equations are solved numerically by the Keller-box method. The results indicate that the thermal stratification significantly affects the surface shear stress as well as the heat transfer rate at the surface. For the opposing flow, solution exists only for small magnitude of the buoyancy parameter.