Abstract
Understanding the mechanism of air-water interaction is very important from the viewpoint of fluid dynamics in estuaries, lakes, and coastal sea areas. However, it is difficult to simulate the multi-phase flow for the incompressible and compressible fluids simultaneously because the physical properties of gas and liquid are quite different.The purpose of the present study is to develop a numerical model of multi-phase flow with a CIP method and a generalized SMAC method. In order to validate the proposed numerical model, complicated hydraulic phenomena with not only gas-liquid interface but also solid-gas-liquid interface have been computed; for example, dam break problem, exchange flow with two different densities in the liquid phase, and collision problem between water and a solid body. It has been demonstrated from the calculation results that the numerical model can give stable results for both gas-liquid phase flow and solid-gas-liquid phase flow and reproduce the complicated hydraulic phenomena precisely.
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