Hydromagnetic simultaneous heat and mass transfer by mixed convection from a vertical plate embedded in a stratified porous medium with thermal dispersion effects |
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Authors: | A J Chamkha A-R A Khaled |
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Institution: | (1) Department of Mechanical and Industrial Engineering Kuwait University P.O. Box 5969 Safat, 13060 Kuwait, KW |
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Abstract: | The problem of steady, laminar, hydromagnetic simultaneous heat and mass transfer by mixed convection flow over a vertical
plate embedded in a uniform porous medium with a stratified free stream and taking into account the presence of thermal dispersion
is investigated for the case of power-law variations of both the wall temperature and concentration. Certain transformations
are employed to transform the governing differential equations to a local similarity form. The transformed equations are solved
numerically by an efficient implicit, iterative, finite-difference scheme. The obtained results are checked against previously
published work on special cases of the problem and are found to be in excellent agreement. A parametric study illustrating
the influence of the magnetic field, porous medium inertia effects, heat generation or absorption, lateral wall mass flux,
concentration to thermal buoyancy ratio, and the Lewis number on the fluid velocity, temperature and concentration as well
as the Nusselt and the Sherwood numbers is conducted. The results of this parametric study is shown graphically and the physical
aspects of the problem are discussed.
Received on 17 November 1998 |
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