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Validation of a Navier-Stokes Model to Study Flip-through Impacts on a Composite Breakwater

Abstract : Two validation cases of the Navier-Stokes VOF (Volume-Of-Fluid) model THETIS are presented in this study: uplift pressures on a rubble mound due to wave impacts and flip-through impacts on a vertical wall. The first validation case demonstrates the ability of the model to reproduce uplift pressure overall variations due to wave impacts inside a porous rubble mound. The presence of a marked pressure peak in the porous medium is also stressed. Then, the flip-through phenomenon is modeled using the THETIS model. These results are compared with other numerical data computed with a potential model. The Navier-Stokes simulations which take into account water and air, underestimate pressures along the wall. The wave interface is modified by the presence of air, which is not considered in the potential model, and this seems to be enough to generate such pressure differences. A better agreement between the two models is obtained while lowering the surrounding gas density to almost zero. \textcopyright Société Hydrotechnique de France, 2017.
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M. Martin-Medina, Stéphane Abadie, Denis Morichon. Validation of a Navier-Stokes Model to Study Flip-through Impacts on a Composite Breakwater. La Houille Blanche - Revue internationale de l'eau, EDP Sciences, 2017, 2017-October (5), pp.49-55. ⟨10.1051/lhb/2017044⟩. ⟨hal-02153680⟩



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