Data di Pubblicazione:
2001
Abstract:
Freak waves are very large, rare events in a random ocean wave train. Here we study their generation in a random sea state characterized by the Joint North Sea Wave Project spectrum. We assume, to cubic order in nonlinearity, that the wave dynamics are governed by the nonlinear Schrödinger (NLS) equation. We show from extensive numerical simulations of the NLS equation how freak waves in a random sea state are more likely to occur for large values of the Phillips parameter α and the enhancement coefficient γ. Comparison with linear simulations is also reported.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Freak wave; modulation instability; Navier-Stokes equation
Elenco autori:
Miguel Onorato; Alfred R. Osborne; Marina Serio; Serena Bertone
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