Sommaire:

We will present the physics of hydrodynamic waves in stratified fluids and in particular in the ocean. Starting with simple experiments emphasizing the generation of  localized  nonlinear  internal  waves at the interface of layers with different  densities,  we will consider the formation  of  hydrodynamics solitons, also called tsunamis. More sophisticated experiments in a continuously stratified fluid allow to understand the behavior of these waves, often very unusual. We will present in particular interesting nonlinear  effects, such  as  parametric  subharmonic  instabilities or reflection on sloping  boundaries which are among the dominant mechanisms leading to dissipation.

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Pour plus d'informations, merci de contacter Berthier L.