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Study on Effective Thermal Conductivity Modeling of Closed-cell Aluminum Foam and Heat Transfer Simulation
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Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University

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    Abstract:

    Effective thermal conductivity is a key parameter to characterize the thermal property of closed-cell aluminum foam. It is of great significance to predict the effective thermal conductivity of closed-cell aluminum foam. In this paper, based on the existing models for effective thermal conductivity of closed-cell aluminum foam, an improved model was proposed. Furthermore, the numerical simulation method was employed to analyze the unsteady heat transfer process of closed-cell aluminum foam. And the effective thermal conductivity was obtained from the distribution of temperature field. The results show that the improved model has higher prediction accuracy compared with Lu model. Besides, the improved model has better applicability and prediction accuracy compared with the three theoretical models from literature.The number of cells in the heat transferdirection has a great influence on the accuracy of the effective thermal conductivity by the numerical simulation method. The accuracy of numerical simulation is the highest when the number of cell holes is enough. Considering cost and accuracy, the improved model has better applicability.

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[Li Jiahui, Geng Dianqiao, Zhang Runyu, Huo Xiaochou, WANG Ping. Study on Effective Thermal Conductivity Modeling of Closed-cell Aluminum Foam and Heat Transfer Simulation[J]. Rare Metal Materials and Engineering,2020,49(5):1637~1642.]
DOI:10.12442/j. issn.1002-185X.20190170

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History
  • Received:February 28,2019
  • Revised:April 25,2019
  • Adopted:May 14,2019
  • Online: June 05,2020
  • Published: