Numerical study of convection in phase change material based on Lattice-Boltzmann method

4th International Conference on Advanced Composite Materials and Manufacturing Engineering 2017

材料科学;化学

Zhang, Tianyu^1 ; Feng, Ying^2 ; Zhao, Zhening^1

North China Electric Power Research Institute, Beijing

100032, China^1

Institute of Economics and Technology of State Grid Chengdu Power Supply Company, Chengdu

610000, China^2

关键词: Convective heat transfer;    Heat transfer equations;    Heat transfer process;    High temperature;    Lattice Boltzmann equations;    Lattice Boltzmann method;    Low temperatures;    Phase change process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/207/1/012072/pdf
DOI  :  10.1088/1757-899X/207/1/012072

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, the lattice Boltzmann method was studied for the phase change process with convective heat transfer in phase change energy storage materials. Firstly, the macroscopic heat transfer equations for the phase change process with convective heat transfer was given, by which we built the lattice Boltzmann equations for solving the problems. In the model, the speed model of D2Q9 was selected, and the boundary conditions including of non-equilibrium extrapolation and bounce back scheme were selected. Then, the effects of different Rayleigh number on the temperature field and velocity field were analyzed. Further research in a square cavity heat transfer processes with high temperature object and low temperature object were studied, in order to observe the effects of different temperature objects in the phase change process using the changes of phase field.