Observation of gravity-capillary wave turbulence
Résumé
We report the observation of the cross-over between gravity and capillary wave turbulence on the surface of mercury. The probability density functions of the turbulent wave height are found to be asymmetric and thus non Gaussian. The surface wave height displays power-law spectra in both regimes. In the capillary region, the exponent is in fair agreement with weak turbulence theory. In the gravity region, it depends on the forcing parameters and is found in rough agreement with theory only for the largest forcing intensities. However, the scaling of those spectra with the mean energy flux is found in disagreement with weak turbulence theory for both regimes.