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The scope of this work is to present and discuss the results obtained from simulating three-dimensional plunging breaking waves. A numerical tool based on the Navier-Stokes equations is used to describe the plunging breaking processes including overturning, splash-up and the occurrence of air entrainment. Initial 3D conditions corresponding to unstable periodic sinusoidal waves of large amplitudes in periodic domains are used to study the air entrainment occurring when waves break. The numerical results highlight the major role of this phenomenon in the energy dissipation process, through a high level of turbulence generation. The numerical model represents a substantial improvement in the numerical modelling of breaking waves since it includes the air entrainment process neglected in most previous existing models.

THREE-DIMENSIONAL NUMERICAL SIMULATIONS OF AERATED VORTEX FILAMENTS UNDER PLUNGING BREAKING WAVES