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NATURAL CONVECTION HEAT AND MASS TRANSFER IN NON-DARCY POROUS MEDIUM EFFECTS OF COMINED DOUBLE DISPERSION, CHEMICAL REACTION, AND THERMAL RADIATION

DOI: 10.1615/ICHMT.2009.CONV.740
17 pages

H. Ali Agha
Laboratory of Biomaterials and Transport Phenomena, University of Medea, BP 164, 26000, Medea

M.N. Bouaziz
Laboratory of Biomaterials and Transport Phenomena, University of Medea, BP 164, 26000, Medea

R. Alouaoui
Laboratory of Biomaterials and Transport Phenomena, University of Medea, BP 164, 26000, Medea

Résumé

The present investigation is devoted to study the combined effect of solutal and thermal dispersion, chemical reaction, and thermal radiation on non Darcy natural convection heat and mass transfer over a vertical flat plate in a fluid saturated porous medium. The Forchheimer flow model is considered. The heat and mass transfer in the boundary region has been analyzed for aiding and opposing buoyancies. The flow, temperature and concentration fields in Darcy and non-Darcy porous media are observed to govern by complex interactions among the diffusion rate Le, buoyancy ratio N, radiation parameter R, chemical reaction parameter χ and the dispersion thermal and solutal diffusivity parameters. All variable characteristic have substantial effect on different profiles.

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