Space-Time Resolved Experiments for Water Waves
M. Chekroun a, A. Maurel a, G. Lagubeau b, V. Pagneux b, P. Cobellic, A. Przadka c and P. Petitjeans c
aInstitut Langevin/LOA and UMR CNRS 7587, ESPCI, UPD Univ. Paris 7, 10 rue Vauquelin, 75231 Paris Cedex 05, France
bLaboratoire d'Acoustique de l'Université du Maine and UMR CNRS 6613, Av. Olivier Messiaen, 72085 Le Mans, France
cPhysique et Mécanique des Milieux Hétérogènes, UMR CNRS 7636, ESPCI, UPMC Univ. Paris 6, UPD Univ. Paris 7, 10 rue Vauquelin, 75005 Paris, France
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An overview of recent works on water wave propagation using a full time-space resolved method is given. The experimental method allows us to precisely measure the surface elevation field with spatial and temporal resolutions given by the pixel size and frequency acquisition of a high speed camera. Two typical problems are regarded: (i) the propagation of water waves through surface piercing obstacles with trapped modes or directional emission, a problem of interest notably for its practical applications to the protection of floating structures and to the canalization of the water wave energy, (ii) a study of water wave turbulence is also reported, exhibiting the interest to measure the joint space-time power spectrum to study which hypothesis of weak turbulence theory survives in laboratory experiments.
DOI: 10.12693/APhysPolA.120.A-142
PACS numbers: 47.35.Bb, 04.30.Nk