Numerical simulations of impact flows with incompressible smoothed particle hydrodynamics

다국어 초록 (Multilingual Abstract)

A 2D incompressible smoothed particle hydrodynamics (SPH) method is implemented to simulate the impact flows associated withcomplex free surface. In the incompressible SPH framework, pressure Poisson equation (PPE) based on the projection method is solvedusing a semi-implicit scheme to evaluate the correct pressure distribution. In this procedure, the PPE comprises the divergence-free velocitycondition and density-invariance condition with a relaxation parameter. To test the accuracy and efficiency of the proposed incompressibleSPH method, it was applied to several sample problems with largely distorted free surface, including 2D dam-break over horizontaland inclined planes with different inclination angles, as well as the water entry of a circular cylinder into a tank. We mainly focusedon the time history of impact pressure on various positions of the solid boundary and temporal evolution of free surface profiles.

The results showed reasonably good agreement with experimental data. However, further improvement is needed for extremely highimpact flow.

참고문헌 (Reference)

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