Uniqueness and stability of planar shock wave to 2D compressible Euler equations in the vanishing viscosity limit of compressible Navier-Stokes equations
Abstract
It is well known that the compressible Euler equations with planar shock initial data may admit infinitely many entropy weak solutions, as shown by Chiodaroli, De Lellis and Kreml [Comm. Pure Appl. Math. (2015)]. In this paper, we introduce a suitable notion of global-in-time weak solutions to the two-dimensional (2D) compressible Navier-Stokes equations with density-dependent viscosities in ℝ × 𝕋. Within this solution framework, we establish the first vanishing viscosity limit selection criterion for the physically relevant planar shock solution to the 2D compressible Euler equations. More precisely, we prove the uniqueness and stability of the 2D Euler planar shock solution within a class of inviscid limits of Navier-Stokes solutions emanating from near-planar initial data while the shock direction perturbation can be arbitrarily large. Starting from the relative κ-entropy for 2D compressible Navier-Stokes equations in 𝕋2 by Bresch, Noble and Vila [ESAIM Proc. Surveys (2017)], we first establish the relative 1/2-entropy between 2D weak solution of compressible Navier-Stokes equations in ℝ × 𝕋 and one-dimensional (1D) strong solution for averaged initial data in ℝ. Then we achieve the desired vanishing viscosity limit selection criterion by successfully bridging the fundamental structural gap between 2D Eulerian formulation of the original Navier-Stokes system in the relative 1/2-entropy and 1D vanishing viscosity limit to a shock solution of Euler equations in Lagrangian coordinates by Kang and Vasseur [Invent. Math. (2021)]. The framework developed herein can be applied to the three-dimensional limit selection criterion in ℝ × 𝕋2, as well as to more complex planar Riemann solutions and interacting wave patterns.
Related
- Global existence and vanishing viscosity limit of the compressible Navier-Stokes-Vlasov-Fokker-Planck system in critical spaces
- Existence and Uniqueness Proof for the Transport Equation and the Orthogonal Dynamics Equation for Zwanzig's Projection on Gaussian Spaces: A Vanishing Viscosity Method
- Vanishing discount and viscosity selection problems for mechanical Hamilton--Jacobi equations
- The vanishing viscosity limit for the inhomogeneous incompressible Navier-Stokes equations around a small obstacle
- Uniqueness of solutions to the 2D compressible Navier-Stokes equations for bounded densities
BibTeX
@misc{chen2026uniqueness,
title = {{Uniqueness and stability of planar shock wave to 2D compressible Euler equations in the vanishing viscosity limit of compressible Navier-Stokes equations}},
author = {Geng Chen and Jeffrey Cheng and Alexis F. Vasseur and Yi Wang},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.10341},
eprint = {2610.10341},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.10341},
}
RIS
TY - UNPB
TI - Uniqueness and stability of planar shock wave to 2D compressible Euler equations in the vanishing viscosity limit of compressible Navier-Stokes equations
AU - Geng Chen
AU - Jeffrey Cheng
AU - Alexis F. Vasseur
AU - Yi Wang
PY - 2026
DA - 2026/10/07
PB - arXiv
DO - 10.48550/arxiv.2610.10341
UR - https://arxiv.org/abs/2610.10341
AB - It is well known that the compressible Euler equations with planar shock initial data may admit infinitely many entropy weak solutions, as shown by Chiodaroli, De Lellis and Kreml [Comm. Pure Appl. Math. (2015)]. In this paper, we introduce a suitable notion of global-in-time weak solutions to the two-dimensional (2D) compressible Navier-Stokes equations with density-dependent viscosities in ℝ × 𝕋. Within this solution framework, we establish the first vanishing viscosity limit selection criterion for the physically relevant planar shock solution to the 2D compressible Euler equations. More precisely, we prove the uniqueness and stability of the 2D Euler planar shock solution within a class of inviscid limits of Navier-Stokes solutions emanating from near-planar initial data while the shock direction perturbation can be arbitrarily large. Starting from the relative κ-entropy for 2D compressible Navier-Stokes equations in 𝕋^2 by Bresch, Noble and Vila [ESAIM Proc. Surveys (2017)], we first establish the relative 1/2-entropy between 2D weak solution of compressible Navier-Stokes equations in ℝ × 𝕋 and one-dimensional (1D) strong solution for averaged initial data in ℝ. Then we achieve the desired vanishing viscosity limit selection criterion by successfully bridging the fundamental structural gap between 2D Eulerian formulation of the original Navier-Stokes system in the relative 1/2-entropy and 1D vanishing viscosity limit to a shock solution of Euler equations in Lagrangian coordinates by Kang and Vasseur [Invent. Math. (2021)]. The framework developed herein can be applied to the three-dimensional limit selection criterion in ℝ × 𝕋^2, as well as to more complex planar Riemann solutions and interacting wave patterns.
ER -