The problem of evaluating the effective thermal conductivity of random packed beds is of great interest to a wide-range of engineers and scientists. This study presents a boundary element model (BEM) for the prediction of the effective thermal conductivity of a two-dimensional packed bed. The model accounts for four heat transfer mechanisms: (1) conduction through the solid; (2) conduction through the contact area between particles; (3) radiation between solid surfaces; and (4) conduction through the fluid phase. The radiation heat exchange between solid surfaces is simulated by the net-radiation method. Two regular packing configurations, square array and hexagonal array, are chosen as illustrative examples. The comparison between the results obtained by the present model and the existing predictions are made and the agreement is very good. The proposed BEM model provides a new tool for evaluating the effective thermal conductivity of the packed beds.
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A Boundary Element Method for Evaluation of the Effective Thermal Conductivity of Packed Beds
Jianhua Zhou,
Jianhua Zhou
School of Materials Science and Engineering,
The University of New South Wales
, Sydney, NSW 2052, Australia
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Aibing Yu,
Aibing Yu
School of Materials Science and Engineering,
The University of New South Wales
, Sydney, NSW 2052, Australia
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Yuwen Zhang
Yuwen Zhang
Department of Mechanical and Aerospace Engineering,
e-mail: zhangyu@missouri.edu
University of Missouri-Columbia
, Columbia, MO 65211
Search for other works by this author on:
Jianhua Zhou
School of Materials Science and Engineering,
The University of New South Wales
, Sydney, NSW 2052, Australia
Aibing Yu
School of Materials Science and Engineering,
The University of New South Wales
, Sydney, NSW 2052, Australia
Yuwen Zhang
Department of Mechanical and Aerospace Engineering,
University of Missouri-Columbia
, Columbia, MO 65211e-mail: zhangyu@missouri.edu
J. Heat Transfer. Mar 2007, 129(3): 363-371 (9 pages)
Published Online: June 6, 2006
Article history
Received:
December 9, 2005
Revised:
June 6, 2006
Citation
Zhou, J., Yu, A., and Zhang, Y. (June 6, 2006). "A Boundary Element Method for Evaluation of the Effective Thermal Conductivity of Packed Beds." ASME. J. Heat Transfer. March 2007; 129(3): 363–371. https://doi.org/10.1115/1.2430721
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