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Journal of Porous Media
Импакт фактор: 1.752 5-летний Импакт фактор: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Печать: 1091-028X
ISSN Онлайн: 1934-0508

Выпуски:
Том 24, 2021 Том 23, 2020 Том 22, 2019 Том 21, 2018 Том 20, 2017 Том 19, 2016 Том 18, 2015 Том 17, 2014 Том 16, 2013 Том 15, 2012 Том 14, 2011 Том 13, 2010 Том 12, 2009 Том 11, 2008 Том 10, 2007 Том 9, 2006 Том 8, 2005 Том 7, 2004 Том 6, 2003 Том 5, 2002 Том 4, 2001 Том 3, 2000 Том 2, 1999 Том 1, 1998

Journal of Porous Media

DOI: 10.1615/JPorMedia.v15.i9.30
pages 835-848

AUGMENTATION OF A HEAT REJECTION MECHANISM IN A VENTILATED ENCLOSURE FILLED PARTIALLY WITH A POROUS LAYER

A. Al-Amiri
Department of Mechanical Engineering, United Arab Emirates University, Al Ain, United Arab Emirates
Khalil Khanafer
Mechanical Engineering Department, Australian College of Kuwait, Safat, 13015

Краткое описание

Heat rejection augmentation in a ventilated cavity filled partially with a porous medium is studied numerically using the finite-element method. Analyses were performed in a mixed convection heat transfer regime. Results were obtained using various pertinent dimensionless parameters; namely; the effects of the solid-to-fluid thermal conductivity ratio (1−100), Darcy number (10−3−10−6), Richardson number (0.01−10), location of the porous layer (0.1−0.9), and width of the porous layer (0.1−0.9) on the streamlines, and the isotherms, average Nusselt number and the bulk average fluid temperature are analyzed in this investigation. The generalized model of the momentum equation, which is also known as the Forchheimer-Brinkman extended Darcy model, is employed in modeling the fluid motion inside the porous layer. In addition, the local thermal equilibrium condition was assumed to be valid for the range of the thermophysical parameters considered in the present investigation. The results of this investigation reveal that the location and width of the porous layer play a significant role in the pattern of the streamlines and isotherms within the enclosure. Moreover, the average Nusselt number and the bulk average fluid temperature are found to increase as the porous layer moves toward the exit port. However, the Nusselt number is found to decrease while the average temperature increases as the width of porous layer increases. Finally, the contribution of the conduction and convection heat transfer regimes to the overall energy transport within the enclosure revealed some interesting optimization scenarios.

Ключевые слова: mixed convection, ventilated enclosure

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