Linear Inviscid Damping and Vorticity Depletion for Shear Flows

Dongyi Wei, Zhifei Zhang, Weiren Zhao

Research output: Contribution to journalArticle

Abstract

In this paper, we prove the linear damping for the 2-D Euler equations around a class of shear flows under the assumption that the linearized operator has no embedding eigenvalues. For the symmetric flows, we obtain the same decay estimate of the velocity as the monotone shear flows. Moreover, we confirm a new dynamical phenomena found by Bouchet and Morita: the depletion of the vorticity at the stationary streamlines, which along with the vorticity mixing leads to the damping for the base flows with stationary streamlines.

Original languageEnglish (US)
Article number3
JournalAnnals of PDE
Volume5
Issue number1
DOIs
StatePublished - Jun 1 2019

Keywords

  • Euler equations
  • Inviscid damping
  • Rayleigh equation
  • Shear flow
  • Vorticity depletion

ASJC Scopus subject areas

  • Analysis
  • Applied Mathematics
  • Geometry and Topology
  • Mathematical Physics
  • Physics and Astronomy(all)

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