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Influence of Aspect Ratio on Natural Convection in a Partially Porous Enclosure

Author(s): R. Mehdaoui | M. Elmir | B. Draoui | O. Imine | A. Mojtabi

Journal: Journal of Applied Sciences
ISSN 1812-5654

Volume: 6;
Issue: 14;
Start page: 2866;
Date: 2006;
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Keywords: Natural convection | porous | saturated | enclosure | fluid | Darcy | Brinkman | aspect ratio

The objective of this research is the study the influence of aspect ratio A1 of fluid portion compared to the height of cavity, on the natural convection in a partially porous enclosure. A cylindrical heat source maintained at a uniform temperature is introduced into porous portion. The equations which describe the thermal transfer and the hydrodynamic flow are described by the Navier-Stokes equations modified by using the extension of Darcy-Brinkman and the energy equation. The results obtained are in the form of isotherm`s distribution, stream`s functions, the local and the average Nusselt numbers and the pressure. Correlations between these parameters and the aspect ratio are considered.
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