Capillary rogue waves

Details Capillary rogue waves Capillary rogue waves

2010-03-01

arxiv.org/abs/1003.0478v1

Phys. Rev. Lett. 104, 104503 (2010)

Physics

Fluid Dynamics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.104.104503

We report the first observation of extreme wave events (rogue waves) in parametrically driven capillary waves. Rogue waves are observed above a certain threshold in forcing. Above this threshold, frequency spectra broaden and develop exponential tails. For the first time we present evidence of strong four-wave coupling in non-linear waves (high tricoherence), which points to modulation instability as the main mechanism in rogue waves. The generation of rogue waves is identified as the onset of a distinct tail in the probability density function of the wave heights. Their probability is higher than expected from the measured wave background.

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