Research On Level-set Methods For Moving Interfaces Of Gas-water-solid

Compressible multiphase flows have a growing interest in developing numerical algorithms and efficient implementation to complex flow phenomenon in CFD.First, In this paper, we focus on Ghost Fluid Method method.This method using Level-Set function separates the one fluid field contains two fluids, each field which consists of real field and ghost field can be calculated. Level-Set method uses Level-Set function to keep track of the interface motion. The zero level of Level-Set is the interface of two fluids, the other level value of Level-Set function of points around interface is the signed distance to interface, and Level-Set function with different sign would represent differene fluid. This method automatically handles the interface that undergoes topological changes. It has another advantage of handling the large deformation problem easily.Secondly, we verify the validity of this method through several numerical simulation experiments.We analyze the results of numerical simulation experiments.The results show that the method can accurately capture the moving interface. Then, we use this method to reaserch the trajectories of water droplets. Using Level-Set Method to get the boundary of the water droplet and its'motion state.Based on the results of the numerical simulation experiments, we get the precise trajectories of water droplets.It is helpful to the numerical simulation of ice surface of aircraft parts.