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arXiv 1003.4172math.AP
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浸没在不可压缩理想流体中的刚体运动的平滑性

Smoothness of the motion of a rigid body immersed in an incompressible perfect fluid

Olivier Glass, Franck Sueur, Takeo Takahashi

AI总结:

本文研究了三维有界区域内不可压缩理想流体中刚体运动的平滑性,证明了其运动平滑性仅受边界平滑性限制,且对解析边界运动呈解析性并平滑依赖初始数据。

摘要:

我们考虑浸没在占据三维有界区域的不可压缩理想流体中的刚体运动。对于这样的系统,如果流体的初始速度属于Hölder空间C^{1,r},则Cauchy问题在时间上是局部适定的。在本文中,我们证明刚体运动的平滑性可能仅受边界(刚体和区域的边界)平滑性的限制。特别地,对于解析边界,刚体的运动是解析的(直到经典解存在且直到固体不撞击边界为止)。此外,在这种情况下,该运动平滑地依赖于初始数据。

英文摘要:

We consider the motion of a rigid body immersed in an incompressible perfect fluid which occupies a three-dimensional bounded domain. For such a system the Cauchy problem is well-posed locally in time if the initial velocity of the fluid is in the Holder space C^{1,r}. In this paper we prove that the smoothness of the motion of the rigid body may be only limited by the smoothness of the boundaries (of the body and of the domain). In particular for analytic boundaries the motion of the rigid body is analytic (till the classical solution exists and till the solid does not hit the boundary). Moreover in this case this motion depends smoothly on the initial data.

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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