The quasi-enthalpy based lattice Boltzmann model for solid-liquid phase change

Abstract

The phase change material (PCM) receives more and more attention for the large amount of latent heat and little temperature variation during phase change. In this paper, a new phase change lattice Boltzmann (LB) model, which is based on the quasi-enthalpy (QE) method, has been developed. The update of temperature is divided into two step, the “prediction” and “consumption (for melting)” or “release (for solidification)”. The problems of one-region phase change, two-region phase change, phase change under constant heat flux and phase change by convection are solved by the present model. All the results are compared with that of analytical solution, integral approximate solution and numerical method. No significant differences can be obtained for all the simulations, which demonstrates that the QE based LB model is able to capture the location of solid-liquid interface and reveal the temperature distribution of PCM accurately.