The Role of Nonlinear Momentum Fluxes on the Evolution of Directional Wind-Wave Spectra

Donald T. Resio; Charles E. Long; William Perrie

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The Role of Nonlinear Momentum Fluxes on the Evolution of Directional Wind-Wave Spectra

机译：非线性动量通量在定向风波谱演化中的作用

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It has long been known that nonlinear wave-wave interactions produce stationary solutions related to constant energy flux through the equilibrium range when a deep-water spectrum follows an/"4 form, as has been verified in numerical studies in which spectra follow a constant angular spreading distribution. This paper shows that, although energy fluxes through such spectra remain essentially constant, momentum fluxes do not. On the other hand, if the angular distribution of a spectrum is allowed to behave in a manner consistent with observations, both the energy flux and the momentum flux tend to remain constant through a major portion of the spectrum. Thus, it appears that directional distributions of energy within wind-wave spectra adjust to a form consistent with nondivergent nonlinear fluxes, suggesting that these fluxes likely play a very prominent role in the evolution of directional spectra during wave generation.

机译：早就知道，当深水频谱遵循“ / 4”形式时，非线性波波相互作用会产生与通过平衡范围的恒定能量通量有关的平稳解，这已在数值研究中证实，其中频谱遵循恒定角。本文表明，尽管通过这样的光谱的能量通量基本上保持恒定，但动量通量却不恒定；另一方面，如果允许光谱的角分布以与观测一致的方式运行，则两个能量通量且动量通量在整个光谱中趋于保持恒定，因此，似乎风能谱中的能量方向分布调整为与非发散非线性通量一致的形式，表明这些通量可能起着非常重要的作用在波产生过程中定向光谱的演化。

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《Journal of Physical Oceanography》 |2011年第4期|p.781-801|共21页
作者
Donald T. Resio; Charles E. Long; William Perrie;
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U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi;

U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi;

Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada;

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The Role of Nonlinear Momentum Fluxes on the Evolution of Directional Wind-Wave Spectra

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