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Journal of Enhanced Heat Transfer
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ISSN Imprimir: 1065-5131
ISSN En Línea: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v15.i1.60
pages 81-99

A Numerical Study of Non-Equilibrium Convective Heat Transfer in Porous Media

Mojtaba Moghari
Department of Mechanical Engineering, University of Tehran, Tehran, Iran

SINOPSIS

In this paper, convective heat transfer for a fully developed laminar flow in porous media under the hypothesis of local thermal non-equilibrium between the fluid and solid phases has been studied. A macroscopically uniform flow is assumed to pass through a porous medium made of two-dimensional periodic arrangement of circular rods placed in an infinite space. By exploiting the periodicity of the porous structure, only one structural unit has been taken as a calculation domain. Extensive numerical calculations were carried out using a finite volume method (SIMPLE) to describe the microscopic velocity and temperature fields at a pore scale. The thus-obtained microscopic numerical results were proposed to extract the macroscopic characteristics in terms of the volume-averaged quantities. Integrated parameters such as macroscopic pressure gradient, thermal dispersion, and interfacial convective heat transfer coefficient were evaluated for a wide range of porosity and Reynolds numbers. The proposed correlations agree well with available numerical and experimental data.


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