﻿ 水滴撞击固体界面问题的Level Set数值模拟

# 水滴撞击固体界面问题的Level Set数值模拟Level Set Method for Numerical Simulation of Droplets Impacting on Solid Interface

Abstract: Level Set method show advantage of dealing with multiphase flows where interfaces can make large deformation and complex topological change. In this paper, we first use the Riemann ghost fluid method (RGFM) advanced by Wang et al. to define the boundary conditions and then solve the compressible Euler equations, using 5th WENO scheme to update level set function which can capture interface more accurately. Based on the current scheme we can easily simulate the multiphase flows which have density ratio of 1000 between two fluids, such as water and gas .In this work, we simulate the movement and topological changes of two droplets which are different in shape when they impact and splash on the solid interface. At the same time we compute the lost ratio of droplet to validate the accuracy of accurate algorithm. Based on the obtained numerical results, we can get the trajectory of droplets. It is helpful to accurately simulate the procedure of icing on the surface of aircraft.

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