这是研究生阶段研究的内容代码，3D计算机流体模拟代码，实现的是三维流体，泊松方程用变分法进行修正，以处理边界条件。-This is the code of postgraduate research, 3D computer fluid simulation code to achieve three-dimensional fluid, the Poisson equation using the variational method would be amended to deal with