Lattice Boltzmann simulation for solid-liquid phase change phenomenon of phase change material under constant heat flux
Lattice Boltzmann simulation for solid-liquid phase change phenomenon of phase change material under constant heat flux
复制标题
恒定热通量下相变材料固液相变现象的格子玻尔兹曼模拟
DOI：
10.1016/j.ijheatmasstransfer.2015.03.006
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发表时间：
2015
影响因子：
5.2
通讯作者：
Rao Zhonghao
中科院分区：
文献类型：
--
作者：
Huo Yutao;Rao Zhonghao
近年来，相变储能材料（PCM）因其储能能力而受到广泛关注。为了更好地理解相变材料固液相变过程中的传热传质规律，进而提高相变材料的应用水平，本文采用格子Boltzmann方法（LBM）对相变材料固液相变问题进行了研究。建立了描述固-液相变现象的热LB模型，并通过定热流下的导热相变解进行了验证。研究了左壁面热流分布的三种情况：均匀分布、线性分布和抛物对称分布。模拟结果表明，在左壁上部集中较多的能量，有利于加强顺时针对流环流。将更多的输入能量集中在左壁中部是加速相变速率和保持相变材料温度的有效途径。
Phase change material (PCM) is receiving significant attention for the ability of storing thermal energy in recent years. In order to better understand the heat and mass transfer of PCM during solid–liquid phase change process and then improve the application of PCM, in this paper, the solution of solid–liquid phase change problem of PCM is investigated by using lattice Boltzmann method (LBM). A thermal LB model for describing the solid–liquid phase change phenomenon has been established and verified by the solution of conduction phase change under constant heat flux. Three kinds of heat flux distribution on left wall have been investigated: uniform distribution, linear distribution and parabolic symmetry distribution. The simulation results showed that concentrating more energy on upper region of left wall can reinforce the clockwise convective circulation. More input energy concentrating on the middle of left wall is the effective way to accelerate the rate of solid–liquid phase change and maintain the temperature of PCM.