Non-stationary regimes of surface gravity wave turbulence

被引：9
|
作者：
Bedard, R. [1 ]
Lukaschuk, S. [1 ]
Nazarenko, S. [2 ]
机构：
[1] Univ Hull, Dept Engn, Kingston Upon Hull HU6 7RX, N Humberside, England
[2] Univ Warwick, Math Inst, Coventry CV4 7AL, W Midlands, England
来源：
JETP LETTERS | 2013年 / 97卷 / 08期
关键词：
Gravity Wave; JETP Letter; Energy Dissipation Rate; Spectral Amplitude; Decay Stage;
D O I：
10.1134/S0021364013080055
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present experimental results about rising and decaying gravity wave turbulence in a large laboratory flume. We consider the time evolution of the wave energy spectral components in omega- and k-domains and demonstrate that emerging wave turbulence can be characterized by two time scales-a short dynamical scale due to nonlinear wave interactions and a longer kinetic time scale characterizing formation of a stationary wave energy spectrum. In the decay regime we observed the maximum of the wave energy spectrum decreasing in time initially as the power law, aet (-1/2), as predicted by the weak turbulence theory, and then exponentially due to viscous friction.
引用
收藏
页码：459 / 465
页数：7
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