Analytical design of effective thermal conductivity for fluid-saturated prismatic cellular metal honeycombs

查看全文 作　　者：Wenbin [1]Wang;Xiaohu [1,2]Yang;Bin [1,3]Han;Qiancheng [1,4]Zhang;Xiangfei [1]Wang;Tianjian [1,4]Lu

机构地区：[1]MOE Key Laboratory for Multifunctional Materials and Structures,Xi'an Jiaotong University,Xi'an 710049,China;[2]Department of Building Environment and Energy Engineering,Xi'an Jiaotong University.Xi'an 710049,China;[3]School of Mechanical Engineering,Xi'an fiaotong University,Xi'an 710049.China;[4]State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi'an jiaotong University,Xi'an 710049,China

出　　处：《Theoretical & Applied Mechanics Letters》索引2016年第6卷第2期,共7页

基　　金：supported by the National Natural Science Foundation of China(51506160,11472208,11472209);China Post-Doctoral Science Foundation Project(2015M580845);the Fundamental Research Funds for Xi’an Jiaotong University(xjj2015102);the Beijing Key Lab of Heating,Gas Supply,Ventilating and Air Conditioning Engineering(NR2016K01) 摘　　要：A comparative optimal design of fluid-saturated prismatic cellular metal honeycombs(PCMHs) having different cell shapes is presented for thermal management applications. Based on the periodic topology of each PCMH, a unit cell(UC) for thermal transport analysis was selected to calculate its effective thermal conductivity. Without introducing any empirical coefficient, we modified and extended the analytical model of parallel–series thermal–electric network to a wider porosity range(0.7 ~ 0.98) by considering the effects of two-dimensional local heat conduction in solid ligaments inside each UC. Good agreement was achieved between analytical predictions and numerical simulations based on the method of finite volume. The concept of ligament heat conduction efficiency(LTCE) was proposed to physically explain the mechanisms underlying the effects of ligament configuration on effective thermal conductivity(ETC).Based upon the proposed theory, a construct strategy was developed for designing the ETC by altering the equivalent interaction angle with the direction of heat flow: relatively small average interaction angle for thermal conduction and relatively large one for thermal insulation. 关键词：有效导热系数优化设计流体饱和多孔金属蜂窝移动热传导效率有限体积法细胞形态

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Analytical design of effective thermal conductivity for fluid-saturated prismatic cellular metal honeycombs

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