Numerical simualation of back step flow using demsity function method with verification of mass conservation

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Koji Asai, Katsutoshi Watanabe

Tuesday 30 june 2015

11:45 - 12:00h at Europe 1 & 2 (level 0)

Themes: (T) Water engineering, (ST) Computational methods

Parallel session: 5E. Engineering - Computational

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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 failure. Asai and Tsubogo developed the volume correction method to avoid this problem. This method was verified to conserve the mass and volume of the fluid, so that this method is called the volume correction method with verification of mass conservation. However, it was verified for the closed boundary condition. In this paper, the volume correction method was applied to the open channel flow with the back step of which the boundaries are the open boundary condition. It is found that the volume correction method is also effective to the open channel flow and the numerical results are almost in agreement with the experimental results.