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多孔介质期刊
影响因子: 1.49 5年影响因子: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

多孔介质期刊

DOI: 10.1615/JPorMedia.v19.i4.60
pages 347-366

MIXED CONVECTION HEAT TRANSFER IN A VENTILATED ENCLOSURE WITH AND WITHOUT A SATURATED POROUS MEDIUM

Ali A. Mohammed
Department of Mechanical Engineering, University of Mosul, Mosul, Iraq
Amir S. Dawood
Department of Mechanical Engineering, University of Mosul, Mosul, Iraq

ABSTRACT

Unsteady mixed convection heat transfer of the laminar fluid flow in a ventilated enclosure with and without a saturated porous medium was studied numerically. The flow outside the porous medium is governed by the Navier−Stokes equation, whereas the Brinkman−Forchheimer−extended Darcy model in which the inertia and boundary effects are taken into consideration governs the flow through the porous medium. The numerical simulations of the fluid flow and heat transfer were investigated with a wide range of Reynolds numbers (50−500) and Richardson numbers (0−10), with Prandtl number, Darcy number, and the porosity fixed at 0.71, 10−5, and 0.9, respectively. The effect of inclination angle on the fluid flow and heat transfer characteristics was studied in a range of angles between 30° and 90°. The results show that the time required to reach the steady state in the case where a porous medium is present is less than that required in the case where a porous medium is absent. Also, there was a major influence of inclination angle and porous materials on the flow and heat distribution in the enclosure.


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