中文说明：模拟二维情况下的晶粒演化，将计算区域离散为正方形网格，采用周期性边界条件。初始相场值为在（-0.001-0.001）之间服从正态分布的随机数，模拟中引入的第二相颗粒近似为圆形。模拟中参数如下：p=36，dx=l，dt=0．1，k=0．5，L=1.0，m=1．0，网格节点数为300x300。
English Description：
Crystal evolution of simulated two-dimensional case, the calculation area is divided into a square grid, with periodic boundary conditions. Initial phase-field value is in ( -0.001-0.001) between the normal distribution of random numbers, introduction of second-phase particles in the simulation approximate to rounded. Simulation parameters are as follows: p=36,DX=l,DT=0. 1,k=0. 5,L=1.0,m=1. 0, the grid point number is 300x300.