Volume 90, Number 3, May 2010
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||27 May 2010|
On the origin of intermittency in wave turbulence
Laboratoire Matière et Systèmes Complexes (MSC), Université Paris Diderot, CNRS, UMR 7057 10 rue A. Domon & L. Duquet, 75 013 Paris, France, EU
2 Laboratoire de Physique, Ecole Normale Supérieure de Lyon, CNRS, UMR 5672 - 69 007 Lyon, France, EU
Corresponding author: firstname.lastname@example.org
Accepted: 28 April 2010
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 also be ascribed to these coherent structures. Statistics of these two events are studied.
PACS: 47.35.-i – Hydrodynamic waves / 47.35.Jk – Wave breaking / 47.27.-i – Turbulent flows
© EPLA, 2010
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