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Variable porosity and thermal dispersion effects on coupled heat and mass transfer by natural convection from a surface embedded in a non‐metallic porous medium

Abdul‐Rahim A. Khaled (Department of Mechanical and Industrial Engineering, Kuwait University, Safat, Kuwait)
Ali J. Chamkha (Department of Mechanical and Industrial Engineering, Kuwait University, Safat, Kuwait)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 1 August 2001

423

Abstract

The problem of coupled heat and mass transfer by natural convection from a vertical impermeable semi‐finite flat plate embedded in a non‐uniform non‐metallic porous medium in the presence of thermal dispersion effects is formulated. The plate surface is maintained at constant wall temperature and concentration. The resulting governing equations are non‐dimensionalized and transformed using a non‐similarity transformation and then solved numerically by an implicit, iterative, finite‐difference scheme. A parametric study of all involved parameters is conducted and a representative set of numerical results is illustrated graphically to show typical trends of the solutions. It is found that the variable porosity of the porous medium and the effect of thermal dispersion result in increases in the local Nusselt number.

Keywords

Citation

Khaled, A.A. and Chamkha, A.J. (2001), "Variable porosity and thermal dispersion effects on coupled heat and mass transfer by natural convection from a surface embedded in a non‐metallic porous medium", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 11 No. 5, pp. 413-429. https://doi.org/10.1108/EUM0000000005530

Publisher

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MCB UP Ltd

Copyright © 2001, MCB UP Limited

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