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

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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

ABSTRACT
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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