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arXiv 2003.06913math.APmath-phmath.MP
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运动物体周围规则时间周期粘性流的存在性、唯一性和渐近性

Existence, Uniqueness and Asymptotic Behavior of Regular Time-Periodic Viscous Flow around a Moving Body

Giovanni P. Galdi

摘要:

我们证明了规则的时间周期解的存在性和唯一性的Navier-Stokes问题的外部的一个刚体,$\mathscr B$,移动任意(足够光滑)的时间周期的平移运动的同一周期,提供的数据的大小是适当的限制。此外,我们的空间渐近行为的特点,这样的解决方案,并证明,特别是,如果$\mathscr B$有一个非零净运动确定的恒定速度$\bar{\mathbfξ}$(说),那么该解决方案表现出唤醒的行为方向$-\bar{\mathbfξ}$完全类似于一个稳态流的速度$\bar{\mathbfξ}$移动的身体周围。

英文摘要:

We show existence and uniqueness of regular time-periodic solutions to the Navier-Stokes problem in the exterior of a rigid body, $\mathscr B$, that moves by arbitrary (sufficiently smooth) time-periodic translational motion of the same period, provided the size of the data is suitably restricted. Moreover, we characterize the spatial asymptotic behavior of such solutions and prove, in particular, that if $\mathscr B$ has a nonzero net motion identified by a constant velocity $\bar{\mathbfξ}$ (say), then the solution exhibit a wake-like behavior in the direction $-\bar{\mathbfξ}$ entirely analogous to that of a steady-state flow around a body that moves with velocity $\bar{\mathbfξ}$.

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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