基于格子 Bhatnagar-Gross-Krook模型的地震压力波模拟

Application of the lattice bhatnagar- gross- krook model to the simulation of seismic pressure wave

摘要: 给出一种新的用于模拟地震压力波的格子Boltzmann模型. 通过使用Chapman-Enskog展开和多重尺度技术，得到了一系列的格子Boltzmann方程和时间尺度t_0上守恒律，给出了满足地震压力波方程所要求的高阶矩以及简单的平衡态分布函数表达式. 数值结果表明这种方法可以用来模拟地震压力波.

Abstract: In this paper, we propose a new lattice Boltzmann modelfor simulating the seismic pressure wave. By usingChapman-Enskog expansion and multi-scales technique, we obtained a serieslattice Boltzmann equations and conservation law in the time scale t_0 . Weselect simple equilibrium distribution functions to get moments for thepressure wave equations. Numerical simulations show this method can be usedto compute seismic pressure wave.