Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Journal of Porous Media

Impact factor: 1.035

ISSN Print: 1091-028X
ISSN Online: 1934-0508

Volumes:
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.i3.40
pages 235-246

HEAT TRANSFER OF NON-NEWTONIAN FLUID FLOW IN A CHANNEL LINED WITH POROUS LAYERS UNDER THERMAL NONEQUILIBRIUM CONDITIONS

M. Abkar
Department of Mechanical Engineering, Amirkabir University of Technology, 424 Hafez Ave, P.O. Box 15875-4413, Tehran
P. Forooghi
Department of Mechanical Engineering, Amirkabir University of Technology, 424 Hafez Ave, P.O. Box 15875-4413, Tehran
Abbas Abbassi
Amirkabir University of Technology, Department of Mechanical Engineering, Tehran, Iran
M. M. Aghdam
Department of Mechanical Engineering, Amirkabir University of Technology, 424 Hafez Ave, P.O. Box 15875-4413, Tehran

ABSTRACT

Forced convection of a non-Newtonian fluid in a channel partially filled with porous layers is studied. In order to study the problem in its most realistic conditions, the Brinkman−Forchheimer model for momentum conservation and two equations, the local thermal equilibrium and nonequilibrium models for energy conservation, are used. Flow is assumed to be fully developed, but development of the thermal boundary layer is taken into account. The effect of the power-law index of the non-Newtonian fluid (n) as well as thermal conductivity of the solid matrix and the thickness of the porous layer are studied. It is shown that thinner porous layer fluids with smaller n show better heat-transfer capability in the same modified Reynolds number, whereas when the porous layer fluids are thicker, fluids with larger n have a greater Nusselt number, except when the thickness ratio is very close to 1.