Effects of mass transfer on free convective flow of a dissipative, incompressible fluid past an infinite vertical porous plate with suction

Effects of mass transfer on the fully developed two-dimensional free convective flow of an incompressible dissipative viscous fluid (i.e., air) past an infinite vertical porous plate in the presence of constant suction are analyzed. The term representing viscous dissipative heat is retained in the energy equation. Approximate solutions to the coupled nonlinear equations governing the problem are obtained, and the resulting velocity and temperature profiles are plotted. Effects of Grashof number, modified Grashof number, Schmidt number, and Eckert number on skin friction and heat transfer represented by Nusselt number are described quantitatively. The results show that: (1) velocity increases and temperature decreases if foreign matter (e.g., hydrogen, water vapor, ethyl benzene) is added to the air; (2) skin friction increases for Schmidt numbers above and below unity but decreases for Schmidt numbers of the order of unity due to the addition of foreign matter; and (3) in the presence of suction and foreign matter, the rate of heat transfer decreases for Schmidt numbers less than unity but increases for Schmidt numbers greater than unity.