| The phase change and phase change material is very common in industrial production and daily life, especially the solid-liquid phase change with many applications in engineer problem. Such as the casting of metals, artificial crystal growth from melts, freezing-thawing soil and so on. Because the reserve of natural gas hydrate is very rich, we need to find a new mining technology of natural gas hydrate which can be transformed into natural gas and water by the hot-water injection method exploitation in recent years.A system called solar wall is used for heating ventilating in solar building abroad. The porous metal plate of the system is coated with selective coating which is set up in building roof or south wall. This can use air as a heat transfer medium and maximize the solar energy conversion into heat. Under the action of the fan and force, indoor can keep a proper temperature with the heating air into room and take effective ventilation effect. Because of the nonlinear characteristics of phase change and the heat and mass of the solar wall, we need to find an efficient and reliable numerical method to deal with it.As a relatively new numerical calculation method, lattice Boltzmann method (LBM) has become a new tool for modeling complicated physical phenomena and simulating fluids flow after several decades’development. LBM is not the same as the traditional Computational Fluid Dynamics (CFD) methods, it is based on mesoscopic kinetics equations and microscopic model to calculate and simulate macro flow field not macroscopic continuum equations. Compared with the traditional CFD methods which is from Navier-Stokes equations, LBM has some special advantages, for example, straightforward codes, easy implementation of boundary conditions, and high degree of parallelism. In this paper, these advantages can make LBM apply successfully to heat and mass transfer in porous media, and some useful simulation results are discussed and studied and also given here. |
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