Numerical simulation of the ship with free surface

There are two embranchments in the numerical simulation of the ship's free surface,one is based on potential flow and the other is based on viscous flow. In the viscous area,there are three embranchments:moving grid,fixed grid and no grid. The VOF(Volume of fluid)of fixed grid is delivered especially. The numerical simulation of ship model's free surface is based on the Geometric Reconstruction Scheme of VOF and accord with the resistance of no drift angle.