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arXiv 2104.12355math.AP
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平面螺旋流的耗散增强及其对三维Kuramoto-Sivashinsky和Keller-Segel方程的应用

Dissipation enhancement of planar helical flows and applications to three-dimensional Kuramoto-Sivashinsky and Keller-Segel equations

Yuanyuan Feng, Binbin Shi, Weike Wang

摘要:

本文介绍了三维环面上的平面螺旋流,并研究了这种流的耗散增强。然后,我们使用这样的流动作为运输流来解决三维对流Kuramoto-Sivashinsky和Keller-Segel方程。Kuramoto-Sivashinsky方程的整体适定性是在线性化算子在与流动正交的方向上不具有增长模式时实现的。对于任意大小的环面和任意大的初始数据,保证了三维Keller-Segel方程的整体经典解。

英文摘要:

We introduce the planar helical flows on three dimensional torus and study the dissipation enhancement of such flows. We then use such flows as transport flows to solve the three dimensional advective Kuramoto-Sivashinsky and Keller-Segel equations. The global well-posedness of the Kuramoto-Sivashinsky equation is achieved when the linearized operator does not have growing mode in the direction orthogonal to the flow. The global classical solution of the three dimensional Keller-Segel is ensured for any size of the torus with arbitrarily large 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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