Effective thermal conductivity of wire-woven bulk Kagome sandwich panels  

作　　者：Xiaohu Yang Jiaxi Bai Ki-Ju Kang Tianjian Lu Tongbeum Kim 

机构地区：[1]School of Energy and Power Engineering,Xi’an Jiaotong University [2]State Key Laboratory for Mechanical Structure Strength and Vibration,Xi’an Jiaotong University [3]Department of Mechanical Systems Engineering,Chonnam National University,Gwangju 500-757,South Korea [4]School of Mechanical Engineering,University of the Witwatersrand, Johannesburg,Wits 2050,South Africa

出　　处：《Theoretical & Applied Mechanics Letters》2014年第5期60-66,共7页力学快报（英文版）

基　　金：supported by the National 111 Project of China(B06024);the National Basic Research Program of China(2011CB610305)

摘　　要：Thermal transport in a highly porous metallic wire-woven bulk Kagome （WBK） is numerically and analytically modeled. Based on topology similarity and upon introducing an elongation parameter in thermal tortuosity, an idealized Kagome with non-twisted struts is employed. Special focus is placed upon quanti- fying the effect of topological anisotropy of WBK upon its effective conductivity. It is demonstrated that the effective conductivity reduces linearly as the poros- ity increases, and the extent of the reduction is significantly dependent on the orientation of WBK. The governing physical mechanism of anisotropic thermal transport in WBK is found to be the anisotropic thermal tortuosity caused by the intrinsic anisotropic topology of WBK.Thermal transport in a highly porous metallic wire-woven bulk Kagome （WBK） is numerically and analytically modeled. Based on topology similarity and upon introducing an elongation parameter in thermal tortuosity, an idealized Kagome with non-twisted struts is employed. Special focus is placed upon quanti- fying the effect of topological anisotropy of WBK upon its effective conductivity. It is demonstrated that the effective conductivity reduces linearly as the poros- ity increases, and the extent of the reduction is significantly dependent on the orientation of WBK. The governing physical mechanism of anisotropic thermal transport in WBK is found to be the anisotropic thermal tortuosity caused by the intrinsic anisotropic topology of WBK.

关 键 词：effective thermal conductivity wire-woven bulk Kagome ANISOTROPY analyticalmodel 

分 类 号：O551.3[理学—热学与物质分子运动论]