图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
多孔介质期刊
影响因子: 1.752 5年影响因子: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN 打印: 1091-028X
ISSN 在线: 1934-0508

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

多孔介质期刊

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

ABSTRACT

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.


Articles with similar content:

NATURAL CONVECTION IN AN ENCLOSURE SATURATEDWITH MULTILAYER POROUS MEDIUM AND NANOFLUID OVER CIRCULAR CYLINDERS: ENTROPY GENERATION
Journal of Porous Media, Vol.21, 2018, issue 10
Sameh Elsayed Ahmed, Abdelraheem M. Aly, Z. A. S. Raizah
EFFECT OF CONFINEMENT ON NATURAL CONVECTION IN POWER-LAW FLUIDS FROM A CIRCULAR CYLINDER
Computational Thermal Sciences: An International Journal, Vol.11, 2019, issue 5
A. K. Gupta, Rajenda P. Chhabra, S. Gupta
INFLUENCE OF VARIABLE PERMEABILITY ON FREE CONVECTION FLOW ALONG A CONVECTIVELY HEATED VERTICAL SURFACE IN A SATURATED POROUS MEDIUM
Journal of Porous Media, Vol.21, 2018, issue 12
R. Z. Wang, Ammarah Raees, Hang Xu
Validity of the Local Thermal Equilibrium Assumption in Natural Convection from a Vertical Plate Embedded in a Porous Medium
Journal of Porous Media, Vol.8, 2005, issue 1
A. N. Al-Khateeb, O. M. Haddad
NATURAL CONVECTION IN A CUBICAL POROUS CAVITY SATURATED WITH NANOFLUID USING TIWARI AND DAS' NANOFLUID MODEL
Journal of Porous Media, Vol.18, 2015, issue 6
Ioan Pop, Mikhail A. Sheremet, Teodor Grosan