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Communication Dans Un Congrès proceedings of the Rogue Wave 2008 Workshop Année : 2008

Wind-forced modulations of gravity waves

Résumé

The effect of wind on modulational instability of gravity waves is presented. A forced nonlinear Schödinger equation that governs the evolution in deep water of weakly nonlinear packets of surface gravity waves under wind forcing is derived. Stokes waves are shown to grow exponentially following Miles' linear mechanism, while modulational instability becomes explosive. These analytical results are completed by numerical simulations and experiments showing the amplification of modulations by wind. Therefore, we suggest that wind boosts the formation of rogue waves.
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Dates et versions

hal-00362165 , version 1 (30-08-2013)

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  • HAL Id : hal-00362165 , version 1

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Stephane Leblanc, Hubert Branger, Marc Francius, Frederic Golay, Christian Kharif. Wind-forced modulations of gravity waves. Rogue wave symposium 2008, Oct 2008, Brest, France. pp.115-116. ⟨hal-00362165⟩
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