Abstract
The density function method is one of the powerful tools for solving a complicated free surface flow problem. However, an air-water interface becomes dim due to a numerical diffusion and it leads conservation of fluid volume to fail. Tsubogo and Asai developed the volume correction method to avoid this problem. Although the long term computation for free water flow can be made by using this method, there is a room to improve their method. In this paper, the volume correction method proposed by Tsubogo and Asai is modified. The effect of the proposed method was checked by solving dam break problems with a whole closed boundary condition. It is found that the modified volume correction method is effective.
