Special Session 63: Singular limit problems arising from nonlinear PDEs

On the Sobolev stability threshold for 3D Navier-Stokes equations with rotation near the Couette flow

Xiaojing Xu
Beijing Normal University
Peoples Rep of China
Co-Author(s):    Wenting Huang, Ying Sun
Abstract:
In this talk, we introduce the dynamic stability of periodic, plane Couette flow in the three-dimensional Navier-Stokes equations with rotation at high Reynolds number $\mathbf{Re}$. Our aim is to determine the stability threshold index on $\mathbf{Re}$, we demonstrate that if initial data satisfies $\left\|u_{\mathrm{in}}\right\|_{H^{\sigma}}\frac{9}{2}$ and some $\delta=\delta(\sigma)>0$ depending only on $\sigma$, then the solution to the 3D Navier-Stokes equations with rotation is global in time without transitioning away from Couette flow. In this sense, Coriolis force contributes as a factor enhancing fluid stability by improving its threshold from $\frac{3}{2}$ to 1. This is a jointed work with Wenting Huang, and Ying Sun.