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arXiv 2203.03537physics.flu-dyn
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凸块上全Euler方程孤立波的波动稳定性

The wave stability of solitary waves over a bump for the full Euler equations

Marcelo V. Flamarion, Roberto Ribeiro-Jr

摘要:

在这项工作中,我们提出了一个数值研究的稳定孤立波的波稳定性超过局部地形障碍,通过完整的欧拉方程。解有两个分支:一个来自扰动均匀流,另一个来自扰动孤立波流。我们发现,从扰动的均匀流的稳定波总是稳定的振幅的扰动。对于扰动孤立波,当扰动初始条件的振幅小于定常解时,我们注意到了某种稳定性。然而,当扰动的初始条件有较大的振幅比稳定的解决方案的波破碎的发病似乎发生。

英文摘要:

In this work, we present a numerical study of the wave stability of steady solitary waves over a localised topographic obstacle through the full Euler equations. There are two branches of the solutions: one from the perturbed uniform flow and the other from the perturbed solitary-wave flow. We find that steady waves from the perturbed uniform flow are always stable with respect to perturbations of its amplitude. Regarding the perturbed solitary-wave, when the perturbed initial condition has smaller amplitude than the steady solution we notice a certain type of stability. Yet, when the perturbed initial condition has larger amplitude than the steady solution an onset of wave-breaking seem to occur.

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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