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arXiv 1605.04091physics.flu-dynnlin.CD
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重力-毛细波turbulence的共振研究

Investigation of resonances in gravity-capillary wave turbulence

Quentin Aubourg, Nicolas Mordant

摘要:

本文报道了在接近于表面重力波和毛细波交叉尺度上的水面波湍流中的非线性波耦合的实验结果。我们在频域和波矢域研究了三波相关。我们观察到,在弱非线性政权,占主导地位的非线性相互作用对应的波是共线或接近共线。虽然纯重力波的共振耦合应该包括4个波,但在毛细管交叉处,我们观察到一个重力波和两个毛细管波之间的非局域耦合。此外,非线性频谱扩展允许3-重力波耦合。这些观测结果提出了这些过程在海洋学背景下的相关性问题,特别是可能受到影响的重力波的频率范围。

英文摘要:

We report experimental results on nonlinear wave coupling in surface wave turbulence on water at scales close to the crossover between surface gravity waves and capillary waves. We study 3-wave correlations either in the frequency domain or in wavevector domain. We observe that in a weakly nonlinear regime, the dominant nonlinear interactions correspond to waves that are collinear or close to collinear. Although the resonant coupling of pure gravity waves is supposed to involve 4 waves, at the capillary crossover we observe a nonlocal coupling between a gravity wave and 2 capillary waves. Furthermore nonlinear spectral spreading permits 3-gravity wave coupling. These observations raise the question of the relevance of these processes in the oceanographic context and in particular the range of frequencies of gravity waves that may be impacted.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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