A PRECISE FREE SURFACE SIMULATION BY LATTICE BOLTZMANN METHOD WITH THE MULTIPLE RELAXATION TIME MODEL

Abstract

 Lattice Boltzmann Method (LBM) is the one of the efficient Computational Fluid Dynamics (CFD) solvers. It has become an alternative powerful method with the other conventional CFD solvers. In this study, we developed a free surface simulation model of LBM with the multiple relaxation time collision operator for high calculation accuracy. The model was verified in the still water simulation and the dambreak flow. The model results are in good agreement with the experimental data, including the movement of free surface of water and solid wall boundary condition. Through the model verification, we found that our model can be applied to simulate the complex behavior of free surface flows.