Forced convection in horizontal porous channels with hydrodynamic anisotropy |
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Authors: | G Degan S ZohounP Vasseur |
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Affiliation: | a LERTI-CPU, Université Nationale du Bénin, Boite Postale 2009, Cotonou, Benin b Ecole Polytechnique, University of Montreal, 6079 “Centre-Ville”, Montreal, Canada H3C 3A7 |
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Abstract: | This paper presents an exact solution for fully developing forced convective flow in parallel-plate horizontal porous channels with an anisotropic permeability whose principal axes are oriented in a direction that is oblique to the gravity vector. A constant heat flux is applied on the channel side walls. Basing this analysis on the generalized Brinkman-extended Darcy model which allows the satisfaction of the no-slip boundary condition on solid wall, it is found that anisotropic parameters K* and ? have a strong influence on the flow fields and heat transfer rate, in the limiting case of low porosity media (Da→0). The results indicate that a maximum (minimum) heat transfer rate is reached when the orientation of the principal axis with higher permeability of the anisotropic porous matrix is parallel (perpendicular) to the vertical direction. |
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