Investigation of free surface flow in wedge water entry problem using Smoothed Particle Hydrodynamics method

Wedge water entry problem is investigated and induced free surface flow problem is studied through Smoothed Particle Hydrodynamics (SPH) method. Firstly, the SPH model is introduced briefly, including numerical approximation, the discretized governing equations, boundary treatment and time stepping algorithm. Then the SPH method is validated by experimental results for further investigations. Afterwards, several wedge water entry cases are tested. The displacement, velocity and dimensionless acceleration of the wedge are quantitatively analysed. Furthermore, motion of the free surface is gotten, and results show that water particles on free surface will move near the free surface during the simulation process. Lastly, splashed out particles are examined. It is found that these particles are almost coming from one fixed region, a w-shape like region. It is proven that SPH method is good to simulate free surface flow problems.