抄録
In a flow field including gas and liquid, non-linear phenomena like a swirling vortex occur due to large scale motion of the gas/liquid interface called the free surface. Since large scale deformation of the free surface may obstruct stable supply of water from a tank, it is important to investigate the motion of the free surface. In the present study, two-and three-dimensional computational programs have been constructed to solve free surface in a water tank using C-CUP (Cubic Interpolated Propagation method and Combined Unified Procedure) scheme. To track the large scale motion of the interface, a density function with the transformation of tangent function has been introduced. To verify the programs, several problems in two-and three-dimensions have been simulated. In all cases, the variation of the free surface has been captured successfully.
