THERMAL-DIFFUSION AND DIFFUSION-THERMO EFFECTS ON MIXED CONVECTION HEAT AND MASS TRANSFER IN A POROUS MEDIUM

摘要

The thermal-diffusion and diffusion-thermo effects on free convection heat and mass transfer, over an infinite vertical plate with periodic temperature and concentration variation, have been studied. The fluid under consideration is obeying the rheological equation of state due to Walter's stress-strain relation. The governing equations have been solved by the use of Laplace transform and the perturbation scheme. The velocity, temperature, and concentration distribution are obtained. The Nusselt number, Nu, and Sherwood number, Nm, are also obtained. The effects of various physical parameters acting on the problem are discussed by a set of figures in a quantitative illustration.