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arXiv 2204.01909math.APmath.DGphysics.flu-dyn
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三维Euler方程涡拉伸的局部性

Locality of vortex stretching for the 3D Euler equations

Yuuki Shimizu, Tsuyoshi Yoneda

摘要:

本文研究了三维不可压Euler方程在小尺度涡团被大尺度定常流拉伸的情况下的解。更准确地说,我们澄清了什么样的大规模的固定流真正拉伸小规模的涡滴与应变方向一致。其关键思想是构造一个拉格朗日坐标,使得李括号为零(参见。Frobenius定理),并利用它研究了压力项的局部性。

英文摘要:

We consider the 3D incompressible Euler equations under the following situation: small-scale vortex blob being stretched by a prescribed large-scale stationary flow. More precisely, we clarify what kind of large-scale stationary flows really stretch small-scale vortex blobs in alignment with the straining direction. The key idea is constructing a Lagrangian coordinate so that the Lie bracket is identically zero (c.f. the Frobenius theorem), and investigate the locality of the pressure term by using it.

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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