应用数学和力学2024，Vol.45Issue(1)：85-96,12.DOI:10.21656/1000-0887.440082
空穴效应下泡沫金属复合相变材料热性能数值模拟
Numerical Analysis on Thermal Performances of Metal Foam Composite Phase Change Materials Under Cavity Effects
摘要
Abstract
A randomly distributed cavity model was constructed for 3D metal foam composite phase change ma-terials(PCMs),and the multi-relaxation time lattice Boltzmann method was used to explore the cavity effects with different volume fractions,distribution locations,and thermal conductivity ratios of metal foam to PCM at the cavity scale.The results show that,with the increase of the cavity volume fraction,the heat transfer rate and latent heat storage capacity of composite PCMs would decrease.At a Fourier number of 0.7,compared to the case without cavity,the heat storage decreases respectively by 3.2%,9.0%,and 13.0%for a cavity volume fraction of 2.4%,7.6%,and 11.7%,respectively.The significant hindering effect on the melting process of com-posite PCMs occurs in the case of cavities with a volume fraction of 3%and concentrated near the high-tempera-ture wall.The cavities act as an adiabatic layer,extending the complete melting time of composite PCMs by 6.1%.To weaken the cavity effect,the metal foam skeleton with a thermal conductivity ratio of more than 100 can be selected to improve its leading role in heat transfer.关键词
相变/泡沫金属/空穴/熔化/格子Boltzmann方法Key words
phase change/metal foam/cavity/melting/lattice Boltzmann method分类
能源与动力引用本文复制引用
潘涵婷,许多,徐洪涛,罗祝清..空穴效应下泡沫金属复合相变材料热性能数值模拟[J].应用数学和力学,2024,45(1):85-96,12.基金项目
上海市自然科学基金(面上项目)(20ZR1438700) （面上项目）
