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arXiv math-ph/0208022math-phmath.MPnlin.CDphysics.ao-ph
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长Internal Waves的Hamilton形式

A Hamiltonian Formulation for Long Internal Waves

Yuri V. Lvov, Esteban G. Tabak

摘要:

本文发展了一种新的旋转环境中长内波的正则哈密顿形式。这包括背景涡度和切变对波的影响。通过限制考虑流体静力平衡中的流动,叠加在水平均匀的垂直切变和涡度背景上,出现了一个特别简单的哈密顿结构,它可以被认为是描述了一个非线性耦合的无限集合的浅水系统。随后推导出描述内波谱能量随时间演化的动力学方程,并在高频极限处找到了一个定态Kolmogorov解。这是令人惊讶的接近加勒特-芒克频谱的海洋内波。

英文摘要:

A novel canonical Hamiltonian formalism is developed for long internal waves in a rotating environment. This includes the effects of background vorticity and shear on the waves. By restricting consideration to flows in hydrostatic balance, superimposed on a horizontally uniform background of vertical shear and vorticity, a particularly simple Hamiltonian structure arises, which can be thought of as describing a nonlinearly coupled infinite collection of shallow water systems. The kinetic equation describing the time evolution of the spectral energy of internal waves is subsequently derived, and a stationary Kolmogorov solution is found in the high frequency limit. This is surprisingly close to the Garrett--Munk spectrum of oceanic internal waves.

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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