山东建筑大学学报2017，Vol.32Issue(4)：356-364,9.
基于LBM的多孔骨架热物性对固液相变的影响研究
Research on the influence of solid liquid phase change in porous skeleton media based on LBM method
宋林泉 1陈宝明 1郜凯凯2
作者信息
- 1. 山东建筑大学热能工程学院,山东济南250101
- 2. 可再生能源建筑利用技术教育部重点实验室,山东济南250101
- 折叠
摘要
Abstract
Changes of heat transfer and flow filled with different thermal conductivity skeleton on the solid-liquid phase change process set the theoretical foundation for the application and development of low temperature phase change energy storage technology.This paper has adopted the two-zone enthalpy-porous model to study the solid-liquid phase transition process based on the Lattice Boltamann Method(LBM).On this basis,the solid-liquid phase change process in porous media was studied based on the pore scale to mainly analyze the influences of porous thermal conductivity on the phase change process.The results show that the heat conduction gradually shifts to the natural convection heat transfer which results in an above narrow and under thick mushy region.Because of the existence of the mushy zone,the phase change material does not completely melt causing a narrow top and wider bottom of the solid material at the left wall of the square cavity.For the solid liquid phase transition process of porous media,the high thermal conductivity porous skeleton has a higher melting rate.However,when the phase transition develops to the quasi steady state,the porous skeleton with high thermal conductivity has a significant effect on the natural convection heat transfer which indicates that the melting rate is less than that of the porous skeleton with low thermal conductivity.关键词
固液相变/格子玻尔兹曼方法/糊状区/多孔骨架/两区域焓—多孔介质模型Key words
solid-liquid phase transition/Lattice Boltamann Method/mushy region/porous skeleton/two-zone enthalpy-porous model分类
建筑与水利引用本文复制引用
宋林泉,陈宝明,郜凯凯..基于LBM的多孔骨架热物性对固液相变的影响研究[J].山东建筑大学学报,2017,32(4):356-364,9.
