Cooling of a hot stretching surface in the presence of across mass transfer phenomenon in a channel flow

Abstract

This is an attempt to investigate the best possible flow situation in order to optimize the rate of heat exchange between the stretching plate and the ambient fluid. The generalized three-dimensional channel flow of an incompressible viscous fluid has been considered where both the walls of the channel are assumed to be porous and the lower wall stretching in two lateral directions at different rates. The effect of simultaneous suction and injection at the lower and upper walls, respectively (and vice versa), have been studied in detail. It is named as across mass transfer phenomenon (AMT). It is observed that even in the presence of viscous dissipation the across mass transfer increases the rate of heat exchange from plate to fluid. A purely analytic solution has been obtained by homotopy analysis method and results are also compared with a numerical technique. Results are discussed through graphs. © 2014 Verlag der Zeitschrift für Naturforschung, Tübingen.