Mold Filling Process Modeling with Multi-Relaxation-Time Lattice Boltzmann Method

This paper presents lattice Boltzmann method as a new approach to simulate the filling process in casting. Lattice Boltzmann method (LBM) is a powerful technique for the simulation of single and multiple-phase flows in complex geometries. Owing to its excellent numerical stability and constitutive versatility it can play an essential role as a simulation tool for understanding advanced materials and processes. In this paper, lattice Boltzmann method to modeling fluid flow is overviewed. After introducing a multi-relaxation-time (MRT) lattice Boltzmann method, LBM parameterization method is presented, a square driven cavity fluid flow case is used to perform the parameterization procedure, and the simulation is performed both by MRT and SOLA methods. Simulation of the results invalidates the parameterization procedure. Then, by using the presented parameterization method, scale problem of using LBM to modeling filling process is proposed and discussed. At last two kinds of effort to overcome the scale problem were presented.