Journal of Porous Media

ISSN for PRINT: 1091-028X

For Online Access

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2001, Volume4

R. Ghafir
Universite de Marne-la-Vallee, 77454 Marne-la-Vallee Cedex 2, France

Guy Lauriat
Université de Marne-La-Vallée, Laboratoire d'Etude des Transferts d'Energie, et de Matière (LETEM), Champs sur Marne—77454 Marne-la-Vallée, Cedex 2, France

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.

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