一则matlab语言下的二维格子玻尔兹曼方法算例，圆柱绕流运动(A two-dimensional lattice Boltzmann method in MATLAB language is used to illustrate the flow around a cylinder)

利用matlab软件编写的格子玻尔兹曼方法模拟的圆柱绕流问题，并实现了可视化(The flow around the cylinder is simulated by lattice Boltzmann method compiled by MATLAB software, and the visualization is realized)