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arXiv 1808.04026math.APmath-phmath.MP
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槽道中库埃特流附近的无粘阻尼

Inviscid damping near the Couette flow in a channel

Alexandru Ionescu, Hao Jia

摘要:

本文证明了二维Euler方程在$\T\times[0,1]$区域上的剪切流在Couette流附近的渐近稳定性。更精确地说,我们证明,如果我们开始与一个小的和光滑的扰动(在一个合适的Gevrey空间)的库埃特流,那么速度场收敛强烈附近的剪切流。最初假设在通道内部得到支持的涡量将在通道内部保持支持,将被线性流驱动到更高的频率,并将以$t\to\infty$的形式弱收敛到$0$,对剪切流取模($x$中的零模式)。

英文摘要:

We prove asymptotic stability of shear flows in a neighborhood of the Couette flow for the 2D Euler equations in the domain $\T\times[0,1]$. More precisely we prove that if we start with a small and smooth perturbation (in a suitable Gevrey space) of the Couette flow, then the velocity field converges strongly to a nearby shear flow. The vorticity, which is initially assumed to be supported in the interior of the channel, will remain supported in the interior of the channel, will be driven to higher frequencies by the linear flow, and will converge weakly to $0$ as $t\to\infty$, modulo the shear flows (zero mode in $x$).

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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