Luc Deike (Scripps Institution of Oceanography)
Surface Wave Turbulence
When a large number of weakly nonlinear waves interact with each other, they can develop a regime of wave turbulence where the wave energy is transferred from the forcing scales to the dissipative scales. This cascade phenomen is analogous to hydrodynamical turbulence and can take place in various contexts involving waves at various scales: astrophysical plasmas, surface waves, internal waves in the ocean or the atmosphere, spin waves in magnetic materials, nonlinear waves in optics, etc.
In this talk, I will discuss laboratory experiments and numerical studies of surface waves in different systems: gravity and capillary waves on a fluid surface and also hydro-elastic waves at the surface of a floating elastic sheet. The results will be discussed in the framework of weak turbulence theory. In particular I will discuss the influence of dissipation at all scales and coherent structures on an ensemble of interacting waves.