Antonin Eddi (PMMH) - A laboratory approach of Hydro-elastic waves

Hydro-elastic waves (HEW) appear at very large scale in the marginal ice zone where the ocean is covered by a thin layer of ice. The physics of HEW is dominated by the bending elasticity of the thin sheet covering the liquid, but their propagation is much slower than plate (Lamb) waves thanks to the fluid inertia. In this seminar, I will describe our experimental approach of HEW. I will first focus on the typically parameter range in which they can be observed at the laboratory scale. In a second step, I will present experimental results about the hydro-elastic Faraday instability obtained by vertically forcing the liquid container. Last, I will show that HEW open promising possibilities for wave control. In particular, I will present experimental configurations that allow for building an HEW based "optics", revisiting Snell's law, geometrical optics and Fourier optics in an hydrodynamical experiment.