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arXiv 1502.04319math.AP
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Prandtl边界层方程解的几乎整体存在性

Almost global existence for the Prandtl boundary layer equations

Mihaela Ignatova, Vlad Vicol

摘要:

我们考虑半平面上的普朗特边界层方程,初始数据位于关于法向变量的加权$H^1$空间中,并且关于切向变量是实解析的。水平欧拉流的边界迹取为常数。我们证明,如果普朗特数据位于$\varepsilon$内的一个稳定的配置文件,则柯西问题的唯一的解决方案可以延长至少到时间$T_\varepsilon \geq \exp(\varepsilon^{-1}/ \log(\varepsilon^{-1}))$。

英文摘要:

We consider the Prandtl boundary layer equations on the half plane, with initial datum that lies in a weighted $H^1$ space with respect to the normal variable, and is real-analytic with respect to the tangential variable. The boundary trace of the horizontal Euler flow is taken to be a constant. We prove that if the Prandtl datum lies within $\varepsilon$ of a stable profile, then the unique solution of the Cauchy problem can be extended at least up to time $T_\varepsilon \geq \exp(\varepsilon^{-1}/ \log(\varepsilon^{-1}))$.

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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