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Linear inviscid damping and enhanced dissipation for the Kolmogorov flow
Advances in Mathematics ( IF 1.494 ) Pub Date : 2020-01-08 , DOI: 10.1016/j.aim.2019.106963
Dongyi Wei; Zhifei Zhang; Weiren Zhao

In this paper, we prove the linear inviscid damping and vorticity depletion phenomena for the linearized Euler equations around the Kolmogorov flow. These results confirm Bouchet and Morita's predictions based on numerical analysis. By using the wave operator method introduced by Li, Wei and Zhang, we solve Beck and Wayne's conjecture on the enhanced dissipation rate for the 2-D linearized Navier-Stokes equations around the bar state called Kolmogorov flow. The same dissipation rate is proved for the Navier-Stokes equations if the initial velocity is included in a basin of attraction of the Kolmogorov flow with the size of ν23+, here ν is the viscosity coefficient.

更新日期:2020-01-08

 

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