年間 8 号発行
ISSN 印刷: 1065-5131
ISSN オンライン: 1563-5074
Indexed in
A Numerical Study of Non-Equilibrium Convective Heat Transfer in Porous Media
要約
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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