Effects of buoyancy forces on a forced-convection laminar flow as well as the forced-convection effects on a purely free-convection laminar flow about a vertical flat plate are analyzed. Solutions are obtained by expanding the stream function and the temperature function into series in terms of the parameter $Grx/Rex2$ when approaching from the forced-convection side, whereas for the free-convection approach in terms of the parameter $(Grx/Rex2)−1/2$. Velocity and temperature profiles, shear stress, and heat transfer are given for various values of the governing parameters.

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