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Journal of Porous Media
Fator do impacto: 1.49 FI de cinco anos: 1.159 SJR: 0.43 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.v18.i12.40
pages 1201-1220

HEAT TRANSFER ENHANCEMENT IN AN ASYMMETRICALLY HEATED CHANNEL PARTIALLY FILLED WITH FIBROUS POROUS MEDIA−A LBM APPROACH

Mohammad Abbaszadeh
Shiraz University, Mechanical Engineering Department, Shiraz, Iran
Alireza Salehi
Mechanical Engineering Department, Amirkabir University of Technology, Hafez Ave., Tehran, Iran; Isfahan University of Technology, Mechanical Engineering Department, Isfahan, Iran
Abbas Abbassi
Department of Mechanical Engineering, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Ave., P.O. Box 15875-4413, Tehran, Iran

RESUMO

In this study, conjugate heat transfer in a 2D planar channel partially filled with fibrous porous media is numerically investigated using the lattice Boltzmann method. The considered porous media is formed by a regular matrix of solid fibers, modeled as square obstacles and located in a cross flow. Asymmetrical thermal boundary conditions are implemented to the channel walls. Pore scale simulation combined with a local thermal nonequilibrium assumption are applied to the solid phase. Average Nusselt number on the constant temperature wall is reported as the criterion for heat transfer enhancement. Effects of geometrical parameters such as blockage ratio, porous block eccentricity, porosity, and some thermophysical parameters such as Reynolds and Prandtl numbers are investigated. Apart from confirming the efficiency of the partially filled channel over the fully filled one, obtained results demonstrate the existence of optimum values for the blockage ratio and porous block eccentricity. Also, heat transfer and pressure drop are increased as the size of the fibers increases. Moreover, decreasing the porosity, by adding number of fibers in the porous block, can increase the value of the average Nusselt number.


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