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Journal of Porous Media
Fator do impacto: 1.49 FI de cinco anos: 1.159 SJR: 0.504 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

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

Journal of Porous Media

DOI: 10.1615/JPorMedia.v13.i11.40
pages 981-988

CROSS-FLOW HEAT EXCHANGER EMBEDDED WITHIN A POROUS MEDIUM

L. B. Younis
SNC-Lavalin Inc, Calgary, Alberta, T2P 3H5, Canada

RESUMO

The present work examines numerically the cross-flow and heat transfer from a bundle of staggered cylinders embedded in a porous medium. The effects of Reynolds number within the laminar flow regime, permeability, and thermal conductivity of the porous material on the fluid flow and heat transfer from the cylinders in the cross-flow are examined. Also, the results are compared with heat transfer from a cylinder embedded in a porous medium. Prandtl number is fixed to 1.0 for gases. It is found that the porous medium may enhance the rate of heat transfer if the permeability of the porous material is high, that is, the Darcy number is greater than 10−3. Also, increasing the thermal conductivity of the porous material has a positive effect on enhancing the rate of heat transfer from the single column of cylinders or from the cylinders in the first column of a multicolumn heat exchanger. However, the porous medium may have a negative effect on the rate of heat transfer from downstream cylinders, where the temperature gradient decreases because of the enhanced rate of heat transfer from the upstream cylinders.


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