Zero Viscosity Limit of Steady Compressible Shear Flow with Navier-Slip Boundary

TL;DR

This paper proves the existence of smooth steady compressible shear flows with Navier-slip boundary conditions and demonstrates their convergence to incompressible Euler solutions as viscosity approaches zero in a two-dimensional domain.

Contribution

It establishes the zero viscosity limit for steady compressible shear flows with Navier-slip boundary conditions, a novel result in this setting.

Findings

Existence of smooth solutions near plane Poiseuille-Couette flow.

Convergence of solutions to steady incompressible Euler equations as viscosity vanishes.

Validates the zero viscosity limit in a two-dimensional domain with Navier-slip conditions.

Abstract

We investigate the existence and the zero viscosity limit of steady compressible shear flow with Navier-slip boundary condition in the absence of any external force in a two-dimension domain $\Omega=(0,L)\times(0,2)$. More precisely, under the assumption that the Mach number $\eta<\va^{\f12+}$ and $L\ll1$, we prove the existence of smooth solutions to steady compressible Naiver-Stokes equations near plane Poiseuille-Couette flow as well as the convergence of the solutions obtained above to the solutions of steady incompressible Euler equations when the viscous $\va$ tends to zero.