Stability of Viscous Contact Wave for Compressible Navier-Stokes Equations with a Large Initial Perturbation

作     者：Hakho Hong 

作者机构：Institute of Mathematics Academy of Sciences 

出 版 物：《Acta Mathematicae Applicatae Sinica》 (应用数学学报（英文版）)

年 卷 期：2015年第31卷第1期

页      面：191-212页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Supported by the CAS-TWAS postdoctoral fellowships(FR number:3240223274) AMSS in Chinese Academy of Sciences 

主　　题：the compressible Navier-Stokes equations contact discontinuity stability decay rate large initialperturbation 

摘      要：The viscous contact wave for the compressible Navier-Stokes equations has recently been shown to be asymptotically stable provided that all the L2 norms of initial perturbations, their derivatives and/or anti-derivatives axe small. The main purpose of this paper is to study the asymptotic stability and convergence rate of the viscous contact wave with a large initial perturbation. For this purpose, we introduce a positive number l in the construction of a smooth approximation of the contact discontinuity for the compressible Euler equations and then we make the quantity l to be sufficiently large in order to control the growth induced by the nonlinearity of the system and the interaction of waves from different families. This makes for us to estimate the L2 norms of the solution and its derivative for perturbation system without assuming that L2 norms of the anti-derivatives and the derivatives of initial perturbations are small.