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Heat Transfer Research
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ISSN Imprimir: 1064-2285
ISSN En Línea: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2015006953
pages 969-994

NUMERICAL ANALYSIS OF HEAT EXCHANGE IN A POROUS CHANNEL WITH HEAT GENERATION AND LOCAL THERMAL NONEQUILIBRIUM

Azzedine Abdedou
Departement du Genie Mecanique, Faculte de Genie de Construction, Universite Mouloud Mammeri De Tizi Ouzou, Algerie; USTHB, Faculty of Mechanical and Process Engineering (FGMGP), Laboratory of Multiphase Transport and Porous Media (LTPMP), Algeria
Khedidja Bouhadef
USTHB, Faculty of Mechanical and Process Engineering (FGMGP), Laboratory of Multiphase Transport and Porous Media (LTPMP), Algeria
Frederic Topin
Polytech Marseille, Laboratoire IUSTI, UMR CNRS 7343, Technopole de Chateau Gombert, 5 rue Enrico Fermi, 13453 Marseille Cedex 13, France

SINOPSIS

We numerically investigate forced convection heat transfer with heat generation and local thermal non-equilibrium in a porous channel bounded by parallel plates. Macroscopic continuity, momentum, and energy equations are presented and solved. Local thermal nonequilibrium is considered by means of independent equations for the solid matrix and the working fluid. The used numerical methodology is based on the control-volume approach. The effects of heat generation rate, thermal conductivity ratio, and Biot interstitial number on the local thermal equilibrium are presented. The main results obtained particularly show that lower values of the temperature difference (local thermal equilibrium) between the solid and the fluid phases are obtained at low values of conductivity ratio and high values of Biot number, while large local temperature differences (local thermal nonequilibrium) are obtained for low Biot numbers values and high thermal conductivity ratios. Moreover, increasing heat generation rate generally leads to thermal nonequilibrium accentuation, particularly and most significantly for low Biot number values.


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