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Journal of Porous Media
Impact-faktor: 1.49 5-jähriger Impact-Faktor: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

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

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v4.i4.40
14 pages

Forced Convection Heat Transfer with Evaporation in a Heat Generating Porous Medium

R. Ghafir
Universite de Marne-la-Vallee, 77454 Marne-la-Vallee Cedex 2, France
Guy Lauriat
Université Paris-Est, Marne la Vallée 5 Boulevard Descartes, Cité Descartes, Champs sur Marne, 77454 Marne la Vallée, Cedex 02

ABSTRAKT

A numerical investigation of internal forced convective flow with boiling through a duct filled with a heat generating porous medium is carried out. At a first stage, inertial as well as variable porosity effects are considered using a homogeneous, two-phase flow model and the Brinkman—Forchheimer extended Darcy model. The capillary effects and liquid-vapor slip are considered next using the multiphase mixture model (MMM). Nonlocal thermal equilibrium between the flowing fluid and the solid matrix is accounted for in each case using two energy equations. The results presented in this work provide detailed information on the influences of wall channeling and capillary effects on velocity and temperature fields in both subcooled and boiling regions. The vapor production process Is studied for various values of the heat generation rate. To end, comparisons are made between the two approaches used in this study.