Numerical calculation of the free water vortex is carried out by using Reynolds stress turbulence model and PISO algorithm.VOF (Volume of Fluid) method is used to deal with the free surface problem.

• 摘要采用雷诺应力湍流模型和PISO算法对自由水涡的运动全过程进行了仿真模拟，运用流体体积(VOF)模型处理自由表面问题，通过模拟计算得到了自由水涡的详细结构和运动过程。