Modulational instability in wind-forced waves

作者：Brunetti Maura^*; Kasparian Jerome

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2014, 378(48): 3626-3630.

DOI：10.1016/j.physleta.2014.10.017

• Modulational instability
• Wind forcing
• Water waves
• Rogue waves

We consider the wind-forced nonlinear Schrodinger (NLS) equation obtained in the potential flow framework when the Miles growth rate is of the order of the wave steepness. In this case, the form of the wind-forcing terms gives rise to the enhancement of the modulational instability and to a band of positive gain with infinite width. This regime is characterised by the fact that the ratio between wave momentum and norm is not a constant of motion, in contrast to what happens in the standard case where the Miles growth rate is of the order of the steepness squared.

• 出版日期2014-11-14