On the origin of intermittency in wave turbulence

E. Falcon1, S. Roux2 & C. Laroche1
1MSC, University Paris Diderot, CNRS - UMR 7057, 75 013 Paris, France
2Ecole Normale Supérieure de Lyon, CNRS - UMR 5672, Lyon, France


EPL 90, 34005 (2010)

URL: http://iopscience.iop.org/0295-5075/90/3/34005
DOI: 10.1209/0295-5075/90/34005


Using standard signal processing tools, we experimentally report that intermittency of wave turbulence on the surface of a fluid occurs even when two typical large-scale coherent structures (gravity wave breakings and bursts of capillary waves on steep gravity waves) are not taken into account. We also show that intermittency depends on the power injected into the waves. The dependence of the power-law exponent of the gravity-wave spectrum on the forcing amplitude cannot be also ascribed to these coherent structures. Statistics of these both events are studied. 

PACS : 47.35.+i  - Hydrodynamic waves, 47.35.Jk  - Wave breaking, 47.27.-i   - Turbulent flows

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