Different regimes for water wave turbulence

COBELLI, PABLO JAVIER

Les Houches, Francia

Conferencia; Ecole de Physique des Houches: Turbulence d'ondes; 2012

CNRS - Université Joseph Fourier - Univ Paris 6 y 7 & LEGI

We present the results of an experimental study on gravity capillary wave turbulence in water. By using space-time resolved Fourier transform profilometry, the behavior of the wave energy density in the 3D frequency-wavenumber space is inspected for various forcing frequency bandwidths and forcing amplitudes. Depending on the bandwidth, the gravity spectral slope is found to be either forcing dependent, as classically observed in laboratory experiments, or forcing independent. In the latter case, the wave spectrum is consistent with the Zakharov-Filonenko cascade predicted within wave turbulence theory.