Convective flow and heat transfer in a tall porous cavity side-cooled with temperature profile |
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Authors: | Ridha Ben Yedder Fouad Erchiqui |
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Affiliation: | aUnité d’enseignement et de recherche en sciences appliquées, Université de Québec en Abitibi-Témescamingue, 445 boul. de l’Université, Rouyn-Noranda (PQ), Canada J9X 5E4 |
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Abstract: | Natural convection in an air-filled (Prandtl number = 0.7) porous cavity with profiled side cooling and constant bottom heating is investigated over the Rayleigh number range of 1×104 to 1×108 at two Darcy numbers: 1×10-4 and 1×10-6. The aspect ratio based on cavity height was varied from 0.5 to 0.1 to investigate penetration length according to linear or sinusoidal temperature profile. The general non-Darcy model adopted in this work was validated against experimental and theoretical results in the literature and Nusselt number was predicted within less than 3% in the worst case. The effect of left wall imposed temperature profile was investigated in detail. Different convective regimes were observed depending on the imposed profile. An active region was found to take place with the linear temperature profile and with extent proportional to Rayleigh number as predicted by scale analysis. |
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Keywords: | Numerical simulation Natural convection Porous media Non-uniform heating Tall cavity |
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