Spectral stability of Prandtl boundary layers: An overview

Spectral stability of Prandtl boundary layers: An overview
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DOI:
10.1515/anly-2015-0001
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发表时间:
2014-06
期刊:
影响因子:
1.6
通讯作者:
E. Grenier;Yan Guo;Toan T. Nguyen
E. Grenier;Yan Guo;Toan T. Nguyen
中科院分区:
--
文献类型:
--
作者:
E. Grenier;Yan Guo;Toan T. Nguyen

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本文讨论了不可压Navier-Stokes方程中Prandtl边界层的稳定性与剪切流的稳定性之间的关系。然后,我们回顾经典的物理不稳定性的结果,并给出了一个简短的教育介绍的建设不稳定模式的Orr-Sommerfeld方程。最后,我们提出了一个关于普朗特边界层渐近展开式有效性的猜想。
Abstract In this paper we show how the stability of Prandtl boundary layers is linked to the stability of shear flows in the incompressible Navier–Stokes equations. We then recall classical physical instability results, and give a short educational presentation of the construction of unstable modes for Orr–Sommerfeld equations. We end the paper with a conjecture concerning the validity of Prandtl boundary layer asymptotic expansions.