By solving Possion equation, the automotive generation of 3-D Body-Fitted Coordinates (BFC) grid system is completed with its density controlled by the distribulation functions P, Q, R.

• 用微分方程法生成计算网格，采用泊松方程完成无堵塞泵的三维贴体网格的自动生成，通过构造波松方程源项P、Q、R分布函数控制网格的疏密度；