Compressible perturbation of Poiseuille type flow

TL;DR

This paper investigates the stability of compressible Poiseuille flows in a 3D pipe, proving existence of stationary solutions with slip boundary conditions using advanced mathematical techniques.

Contribution

It introduces a novel approach using modified Lagrangian coordinates to establish the existence of stationary solutions near generic flows.

Findings

Existence of stationary solutions with inhomogeneous slip boundary conditions.

Application of a modified Lagrangian coordinate technique.

Overcoming hyperbolicity challenges in the continuity equation.

Abstract

The paper examines the issue of stability of Poiseuille type flows in regime of compressible Navier-Stokes equations in a three dimensional finite pipe-like domain. We prove the existence of stationary solutions with inhomogeneous Navier slip boundary conditions admitting nontrivial inflow condition in the vicinity of constructed generic flows. Our techniques are based on an application of a modification of the Lagrangian coordinates. Thanks to such approach we are able to overcome difficulties coming from hyperbolicity of the continuity equation, constructing a maximal regularity estimate for a linearized system and applying the Banach fixed point theorem.