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arXiv 1908.03787math.AP
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周期底流中的定常波

Steady waves in flows over periodic bottoms

Walter Craig, Carlos García-Azpeitia

摘要:

本文研究了二维流体在平均流速为$c$的水流流过周期性底时定常波的形成。使用一个配方的基础上的狄利克雷-诺依曼算子,我们建立了一个稳定的解决方案,从平凡的解决方案时,平底扰动,除了一系列的速度$c_{k}$。主要的贡献是证明了至少有两个稳定的解决方案存在接近的非退化$S^{1}$ -轨道的非常数稳定波时,平底扰动。因此,我们得到的持久性至少有两个稳定的波接近一个非退化的$S^{1}$轨道的斯托克斯波分叉的速度$c_{k}$。

英文摘要:

We study the formation of steady waves in two-dimensional fluids under a current with mean velocity $c$ flowing over a periodic bottom. Using a formulation based on the Dirichlet-Neumann operator, we establish the unique continuation of a steady solution from the trivial solution when a flat bottom is perturbed, except for a sequence of velocities $c_{k}$. The main contribution is the proof that at least two steady solutions exist close to a non-degenerate $S^{1}$-orbit of non-constant steady waves when a flat bottom is perturbed. Consequently, we obtain persistence of at least two steady waves close to a non-degenerate $S^{1}$-orbit of Stokes waves bifurcating from the velocities $c_{k}$.

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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