A novel semi-empirical model with an improved single blow method for exploring the heat transfer performance of porous aluminum-foam heat sinks in a channel has been successfully developed. The influencing parameters such as the steady-state air preheating temperature ratio, Reynolds number and medium porosity on local and average heat transfer behavior of porous aluminum-foam heat sinks in a channel are explored. The heat transfer enhancement of using a porous heat sink in a channel to a hollow channel is, , much greater than unity and generally decrease with increasing . Furthermore, two new correlations of and in terms of and are proposed. As compared with the results evaluated by the transient liquid crystal method, the channel wall temperatures predicted by the present semi-empirical model have a more satisfactory agreement with the experimental data, especially for the cases with smaller porosities. The limitations with relevant error maps of using the transient liquid crystal method in porous aluminum foam channels are finally postulated.
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e-mail: yhhung@pme.nthu.edu.tw
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September 2005
Research Papers
A Novel Semi-empirical Model for Evaluating Thermal Performance of Porous Metallic Foam Heat Sinks
Tzer-Ming Jeng,
Tzer-Ming Jeng
Assistant Professor
Department of Mechanical Engineering,
Air Force Institute of Technology
, Gang-Shan, Kaohsiung 820, Taiwan
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Li-Kang Liu,
Li-Kang Liu
Graduate Student
Department of Power Mechanical Engineering,
National Tsing Hua University
, Hsinchu 30013, Taiwan
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Ying-Huei Hung
Ying-Huei Hung
Professor
ASME Fellow
Department of Power Mechanical Engineering,
e-mail: yhhung@pme.nthu.edu.tw
National Tsing Hua University
, Hsinchu 30013, Taiwan
Search for other works by this author on:
Tzer-Ming Jeng
Assistant Professor
Department of Mechanical Engineering,
Air Force Institute of Technology
, Gang-Shan, Kaohsiung 820, Taiwan
Li-Kang Liu
Graduate Student
Department of Power Mechanical Engineering,
National Tsing Hua University
, Hsinchu 30013, Taiwan
Ying-Huei Hung
Professor
ASME Fellow
Department of Power Mechanical Engineering,
National Tsing Hua University
, Hsinchu 30013, Taiwane-mail: yhhung@pme.nthu.edu.tw
J. Electron. Packag. Sep 2005, 127(3): 223-234 (12 pages)
Published Online: May 8, 2004
Article history
Received:
April 8, 2004
Revised:
May 8, 2004
Citation
Jeng, T., Liu, L., and Hung, Y. (May 8, 2004). "A Novel Semi-empirical Model for Evaluating Thermal Performance of Porous Metallic Foam Heat Sinks." ASME. J. Electron. Packag. September 2005; 127(3): 223–234. https://doi.org/10.1115/1.1997159
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