Modulational instability in wind-forced waves

被引：33

作者：

Brunetti, Maura ^{[1
,2
]}

Kasparian, Jerome ^{[3
]}

机构：

[1] Univ Geneva, GAP Climate, CH-1227 Carouge, Switzerland

[2] Univ Geneva, Inst Environm Sci, CH-1227 Carouge, Switzerland

[3] Univ Geneva, GAP Nonlinear, CH-1227 Carouge, Switzerland

来源：

PHYSICS LETTERS A | 2014年 / 378卷 / 48期

关键词：

Modulational instability; Wind forcing; Water waves; Rogue waves; WATER-WAVES; DEEP-WATER; OPPOSING WIND; GENERATION; STABILITY; TRAINS; FLOWS;

D O I：

10.1016/j.physleta.2014.10.017

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：3626 / 3630

页数：5

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