Uniform transpiration effect on coupled heat and mass transfer in mixed convection about inclined surfaces in porous media: The entire regime

Abstract

A boundary layer analysis is used to investigate the effect of uniform transpiration velocity on the heat and mass transfer characteristics of mixed convection about inclined surfaces in saturated porous media under the coupled effects of thermal and mass diffusion. The surfaces are maintained at variable wall temperature (VWT) and variable wall concentration (VWC). Nonsimilar governing equations are obtained by using a suitable transformation and solved by Keller box method. Numerical results are presented for the local Nusselt number as well as the local Sherwood number. The local Nusselt number and the local Sherwood number increase (decrease) due to the effect of suction (blowing). Increasing the buoyancy ratio N increases the local Nusselt number and the local Sherwood number. It is apparent that the Lewis number has a pronounced effect on the local Sherwood number than it does on the local Nusselt number. Furthermore, increasing the Lewis number decreases (increases) the local heat (mass) transfer rate.