Special Session 9: Recent Progress in Mathematical Theory of Stability and Instability in Fluid Dynamics

Nonlinear Inviscid damping for 2-D inhomogeneous incompressible Euler equations
Chen Qi
Zhejiang University School of mathematical sciences
Peoples Rep of China
Co-Author(s):    Dongyi Wei, Ping Zhang, Zhifei Zhang
Abstract:
We prove the asymptotic stability of shear flows close to the Couette flow for the 2-D inhomogeneous incompressible Euler equations on TxR. More precisely, if the initial velocity is close to the Couette flow and the initial density is close to a positive constant in the Gevrey class 2, then 2-D inhomogeneous incompressible Euler equations are globally well-posed and the velocity converges strongly to a shear flow close to the Couette flow, and the vorticity will be driven to small scales by a linear evolution and weakly converges as t tends to infinity.