Liquid Sloshing Damping Computation in Cylindrical Tank Based on VOF Method

For liquid sloshing in partially filled cylindrical tank, the influence of the free surface on the sloshing damping is very important, especially in the application of spacecraft. In order to calculate the damping characteristic of partially filled cylindrical tanks more accurately, the finite volume scheme base on Volume-of-Fluid (VOF) is used to simulate the interface flow in the tank. Second order accurate piecewise line interface construction scheme is used to reconstruct the free surface. Through the numerical simulation, the influence on the sloshing damping with different liquid fill ratios in the cylindrical tanks is obtained.At the end, by use of semi-empirical equation, found that it agrees with theoretical results reasonably well.