基于COMSOL闭孔泡沫铝模型的导热系数分析  

Thermal conductivity analysis of closed cell aluminum foam model based on COMSOL

作　　者：余力洲 宋臣 林杰 付雨鹏 王海亮[2] 缪玉松 Yu Lizhou;Song Chen;Lin Jie;Fu Yupeng;Wang Hailiang;Miao Yusong(School of Science,Qingdao University of Technology,Qingdao 266525,China;Safety and Environmental Engineering College,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]青岛理工大学理学院,山东青岛266525 [2]山东科技大学安全与环境工程学院,山东青岛266590

出　　处：《山西建筑》2022年第10期78-81,共4页Shanxi Architecture

基　　金：国家自然科学基金(51879135,52064004);山东省自然科学基金项目(ZR2019BA023);青岛理工大学本科教学改革与研究面上项目资助(10335236);大学生创新创业项目(S202010429002)。

摘　　要：基于MATLAB中的随机球模型,开发迭代算法,构建一系列孔径、孔隙率差异组合的闭孔泡沫铝三维仿真模型。通过模型转换后,应用COMSOL自带的经典热学方程求解闭孔泡沫铝板的导热系数,得出了中高孔隙率范围内闭孔泡沫铝等效导热系数,对各个模型的结果进行分析,总结出了闭孔泡沫铝导热系数变化规律,该模型得出的导热系数基本符合满足理论公式的规律:泡沫铝材料随孔隙率的提高导热系数规律减小,依据模拟数据求解出孔隙率在50%~70%的闭孔泡沫铝导热系数为原基体材料的38.8%~22.1%等规律,并给出泡沫铝导热系数预测曲线。研究结果对闭孔泡沫铝导热性能研究具有重要的意义。In this study,an iterative algorithm was developed based on the random ball model in MATLAB.A series of three-dimensional simulation models of closed-cell aluminum foam with different pore size and porosity were constructed.After model transformation,the classical thermal equation of COMSOL was applied to solve the thermal conductivity of closed-cell aluminum foam,and the equivalent thermal conductivity of closed-cell aluminum foam in the range of medium and high porosity was obtained.By analyzing the results of each model,the variation law of thermal conductivity of closed-cell aluminum foam was summarized.The thermal conductivity obtained by this model basically conforms to the law measured by experiment:the thermal conductivity of aluminum foam decreases with the increase of porosity.According to the simulation data,the thermal conductivity of closed-cell aluminum foam with porosity of 50%to 70%is 38.8%to 22.1%of that of the original matrix material,and the prediction curve of thermal conductivity of aluminum foam is given.The results are of great significance to the thermal conductivity of closed-cell aluminum foam.

关 键 词：闭孔泡沫铝 导热系数 三维模型 随机球模型 

分 类 号：TG146.21[一般工业技术—材料科学与工程]