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arXiv 2109.01029math.AP
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带旋转的整体轴对称Euler流

Global Axisymmetric Euler Flows with Rotation

Yan Guo, Benoit Pausader, Klaus Widmayer

摘要:

我们构造了一类整体,动力学解的三维欧拉方程附近的稳定状态的均匀“刚体”旋转。这些解是轴对称的,具有Sobolev正则性,由于旋转引起的色散效应,具有非零涡旋和线性散射。为了建立这一点,我们引入了一个框架,该框架建立在问题的对称性基础上,并精确地捕获了由于旋转引起的各向异性、色散机制。这使得非线性相互作用的几何形状的精细分析,并允许我们传播尖锐的衰减边界,这是全球欧拉流的建设至关重要的。

英文摘要:

We construct a class of global, dynamical solutions to the 3d Euler equations near the stationary state given by uniform "rigid body" rotation. These solutions are axisymmetric, of Sobolev regularity, have non-vanishing swirl and scatter linearly, thanks to the dispersive effect induced by the rotation. To establish this, we introduce a framework that builds on the symmetries of the problem and precisely captures the anisotropic, dispersive mechanism due to rotation. This enables a fine analysis of the geometry of nonlinear interactions and allows us to propagate sharp decay bounds, which is crucial for the construction of global Euler flows.

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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