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李家卉,耿佃桥,张润雨,霍小臭,王平.闭孔泡沫铝有效热导率模型及传热模拟研究[J].稀有金属材料与工程(英文),2020,49(5):1637~1642.[Li Jiahui,Geng Dianqiao,Zhang Runyu,Huo Xiaochou and 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.]
Study on Effective Thermal Conductivity Modeling of Closed-cell Aluminum Foam and Heat Transfer Simulation
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Received:February 28, 2019  Revised:April 25, 2019
DOI:
Key words: Closed-cell Aluminum Foam  Effective thermal conductivity  Theoretical model  Numerical simulation
Foundation item:中央高校基本科研业务费专项资金资助(N180904007),国家自然科学基金资助(51304038)
Author NameAffiliation
Li Jiahui,Geng Dianqiao,Zhang Runyu,Huo Xiaochou and WANG Ping  
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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.