Materials Reports 2019, Vol. 33 Issue (z1): 211-215 |
INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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The Evolution Relation Between Materials’Porosity and Thermal Conductivity Based on the Simulation by COMSOL® Software |
DING Yang1, DENG Mangyu1, ZHOU Shuangxi2, WANG Zhongping3, DONG Jingliang2, WEI Yongqi3
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1 School of Architecture engineering, Zhejiang University, Hangzhou 310058 2 School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013 3 School of Materials Science and Engineering, Tongji University, Shanghai 201804 |
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Abstract In order to study the effect of different porosity on thermal conductivity of materials, a random distribution model is established by MATLAB, and the analysis is made by COMSOL® finite element software and classical theoretical calculation formula. It is concluded that the random generated code based on MATLAB can show the change of material porosity, and COMSOL® can effectively calculate the thermal conductivity qualitatively; the thermal conductivity calculated by Zimmerman model is quite different from COMSOL® model and Campbell-Allen model, Campbell-Allen model is in good agreement with the results of COMSOL® calculation. The curve of thermal conductivity calculated by COMSOL® is composed of concave function and convex function. This phenomenon occurs because the occurrence of holes will lead to the change of heat transfer path, so that the change rate of thermal conductivity will change.
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Published: 05 July 2019
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About author:: Yang Ding is a Ph.D. candidate in Zhejiang University. His research interests are building energy saving and thermal insulation materials.Jingliang Dong, lecturer at East China Jiaotong University.His research interests are new building materials and their applications. |
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