Effective thermal conductivity of the solid backbone of aerogel
Effective thermal conductivity of the solid backbone of aerogel
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DOI：
10.1016/j.ijheatmasstransfer.2013.04.053
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发表时间：
2013-09-01
影响因子：
5.2
通讯作者：
Tang, G. H.
中科院分区：
文献类型：
--
作者：
Bi, C.;Tang, G. H.
在超晶格纳米线模型的基础上，提出了一个修正的模型来预测气凝胶固体骨架的有效热导率。我们研究了尺寸效应和界面电阻效应对气凝胶骨架互连颗粒热导率的影响。由于界面热阻的影响，气凝胶骨架的有效热导率显著低于纯纳米线和单个颗粒的有效热导率。当气凝胶密度大于100 kg/m3时，该模型计算的气凝胶固体热导率与最小热导率模型计算的结果吻合较好，与实验数据吻合较好。(C)2013爱思唯尔有限公司保留所有权利。
Based on the superlattice nanowire model, a modified model to predict the effective thermal conductivity of aerogel solid backbone is presented. We study both the size effect and interfacial resistance effect on the thermal conductivity of interconnected particles of the aerogel backbone. The effective thermal conductivity of the aerogel backbone is significantly lower than that of the pure nanowire and the single particle due to the interfacial thermal resistance. The solid thermal conductivity of the aerogel calculated by the present model is in good agreement with that by the minimum thermal conductivity model, and also agrees well with available experimental data when the aerogel density is above 100 kg/m(3). (C) 2013 Elsevier Ltd. All rights reserved.