Water entry of a solid through a free surface is of interest in ship hydrodynamics applications, namely to study ships behaviour in slamming cases for instance. The study presented here deals with the introduction of a new method based on SPH, and aiming at an accurate numerical prediction of the free motion of a body in a free surface. The validation case exposed here is the water entry of a massive wedge, and comparisons with experimental data are provided. Then simulations involving a box and a pierced box in interaction with waves illustrate the flexibility of the method.

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