Viscous Shock Wave to an Inflow Problem for Compressible Viscous Gas with Large Density Oscillations

Dong fen Bian, Li li Fan, Lin He*, Hui jiang Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper is concerned with the inflow problem for one-dimensional compressible Navier-Stokes equations. For such a problem, Huang, Matsumura, and Shi showed in [4] that there exists viscous shock wave solution to the inflow problem and both the boundary layer solution, the viscous shock wave, and their superposition are time-asymptotically nonlinear stable provided that both the initial perturbation and the boundary velocity are assumed to be sufficiently small. The main purpose of this paper is to show that similar stability results still hold for a class of large initial perturbation which can allow the initial density to have large oscillations. The proofs are given by an elementary energy method and our main idea is to use the smallness of the strength of the viscous shock wave and the boundary velocity to control the possible growth of the solutions induced by the nonlinearity of the compressible Navier-Stokes equations and the inflow boundary condition. The key point in our analysis is to deduce the desired uniform positive lower and upper bounds on the density.

Original languageEnglish
Pages (from-to)129-157
Number of pages29
JournalActa Mathematicae Applicatae Sinica
Volume35
Issue number1
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • 35B40
  • 35Q35
  • 76N10
  • 76N15
  • compressible Navier-Stokes equations
  • inflow problem
  • large density oscillations
  • viscous shock wave

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