应用格子Boltzmann模型模拟一类二维偏微分方程

Use of lattice Boltzmann method to simulate 2-D partial differential equation

针对一类含源的二维非线性偏微分方程,通过Chapman-Enskog展开技术和多尺度分析提出了带修正项的简单格子Boltzmann模型.用模型模拟了几类二维偏微分方程,数值模拟结果与精确解相符合.成功将格子Boltzmann方法应用到二维偏微分方程的数值求解中.

For a class of two-dimensional nonlinear partial differential equation with the source term,a simple lattice Boltzmann model with amending function is proposed and studied using the Chapman-Enskog expansion technique and multiple-scale analysis. In this paper, some partial differential equation are simulated, the numerical results and exact solutions are shown to be almost completely fitting with each other. The lattice Boltzmann method is further extended to two-dimensional partial differential equation.