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We establish a weak-strong uniqueness result for the isentropic compressible Euler equations, that is: As long as a sufficiently regular solution exists, all energy-admissible weak solutions with the same initial data coincide with it. The…

Analysis of PDEs · Mathematics 2021-03-31 Shyam Sundar Ghoshal , Animesh Jana , Emil Wiedemann

We introduce a novel concept of dissipative measure-valued martingale solution to the stochastic Euler equations describing the motion of an inviscid incompressible fluid. These solutions are characterized by a parametrized Young measure…

Analysis of PDEs · Mathematics 2020-12-21 Abhishek Chaudhary , Ujjwal Koley

We give a survey of recent results on weak-strong uniqueness for compressible and incompressible Euler and Navier-Stokes equations, and also make some new observations. The importance of the weak-strong uniqueness principle stems, on the…

Analysis of PDEs · Mathematics 2017-05-12 Emil Wiedemann

We consider the Savage-Hutter system consisting of two-dimensional depth-integrated shallow water equations for the incompressible fluid with the Coulomb-type friction term. Using the method of convex integration we show that the associated…

Analysis of PDEs · Mathematics 2017-06-14 Eduard Feireisl , Piotr Gwiazda , Agnieszka Swierczewska-Gwiazda

In the class of admissible weak solutions, we prove a weak-strong uniqueness result for the incompressible Euler equations assuming that the symmetric part of the gradient belongs to $L^1_{\rm loc}([0,+\infty);L^{\rm…

Analysis of PDEs · Mathematics 2023-09-07 Luigi De Rosa , Marco Inversi , Giorgio Stefani

We consider a real two-fluid system of compressible viscous fluids with a common velocity field and algebraic closure for the pressure law. The constitutive relation involves densities of both fluids through an implicit function. The…

Analysis of PDEs · Mathematics 2026-02-24 Yang Li , Mária Lukáčová-Medvid'ová , Milan Pokorný , Ewelina Zatorska

We consider the coupled motion of a free rigid body immersed in an inviscid compressible isentropic fluid. By means of a vanishing viscosity limit, we obtain the local-in-time existence of a dissipative measure-valued solution to the model.…

Analysis of PDEs · Mathematics 2026-03-04 Qianfeng Li , Emil Wiedemann

Measure-valued solutions to fluid equations arise naturally, for instance as vanishing viscosity limits, yet exhibit non-uniqueness to a vast extent. In this paper, we show that some measurevalued solutions to the two-dimensional isentropic…

Analysis of PDEs · Mathematics 2023-03-14 Dennis Gallenmüller , Emil Wiedemann

The Cauchy problem for the complete Euler system is in general ill posed in the class of admissible (entropy producing) weak solutions. This suggests there might be sequences of approximate solutions that develop fine scale oscillations.…

Numerical Analysis · Mathematics 2018-03-23 Eduard Feireisl , Maria Lukacova-Medvidova , Hana Mizerova

This paper concerns with the compressible two-fluid model with algebraic pressure closure. We prove a conditional weak-strong uniqueness principle, meaning that a finite energy weak solution, with bounded densities, coincides with the…

Analysis of PDEs · Mathematics 2021-12-02 Yang Li , Ewelina Zatorska

We consider the Cauchy problem for incompressible viscoelastic fluids in the whole space $\mathbb{R}^d$ ($d=2,3$). By introducing a new decomposition via Helmholtz's projections, we first provide an alternative proof on the existence of…

Analysis of PDEs · Mathematics 2023-07-28 Xianpeng Hu , Hao Wu

We identify a class of measure-valued solutions of the barotropic Euler system on a general (un-bounded) spatial domain as a vanishing viscosity limit for the compressible Navier-Stokes system. Then we establish the weak…

Analysis of PDEs · Mathematics 2020-10-23 Danica Basarić

In this paper, we propose a new approach to singular limits of inviscid fluid flows based on the concept of dissipative measure-valued solutions. We show that dissipative measure-valued solutions of the compressible Euler equations converge…

Analysis of PDEs · Mathematics 2019-05-06 Eduard Feireisl , Christian Klingenberg , Simon Markfelder

We show that any dissipative (measure-valued) solution of the compressible Euler system that complies with Dafermos' criterion of maximal dissipation is necessarily an admissible weak solution. In addition, we propose a simple, at most two…

Analysis of PDEs · Mathematics 2025-01-23 Eduard Feireisl , Ansgar Jüngel , Mária Lukáčová-Medvid'ová

We establish the vanishing viscosity limit of the Navier-Stokes equations to the isentropic Euler equations for one-dimensional compressible fluid flow. For the Navier-Stokes equations, there exist no natural invariant regions for the…

Analysis of PDEs · Mathematics 2009-10-14 Gui-Qiang Chen , Mikhail Perepelitsa

We introduce a new concept of dissipative measure-valued martingale solutions to the stochastic compressible Euler equations. These solutions are weak in the probabilistic sense i.e., the probability space and the driving Wiener process are…

Analysis of PDEs · Mathematics 2020-12-15 Martina Hofmanova , Ujjwal Koley , Utsab Sarkar

Weak-strong uniqueness property in the class of finite energy weak solutions is established for two different compressible liquid crystal systems by the method of relative entropy. To overcome the difficulties caused by the molecular…

Analysis of PDEs · Mathematics 2012-05-08 Yong-Fu Yang , Changsheng Dou , Qiangchang Ju

We prove weak-strong uniqueness results for the isentropic compressible Navier-Stokes system on the torus. In other words, we give conditions on a strong solution so that it is unique in a class of weak solutions. Known weak-strong…

Analysis of PDEs · Mathematics 2015-05-13 Pierre Germain

This article studies the equations of adiabatic thermoelasticity endowed with an internal energy satisfying an appropriate quasiconvexity assumption which is associated to the symmetrisability condition for the system. A G{\aa}rding-type…

Analysis of PDEs · Mathematics 2021-10-01 Myrto Galanopoulou , Konstantinos Koumatos , Andreas Vikelis

We extend the weak-strong uniqueness principle to general models of compressible viscous fluids near/on the vacuum. In particular, the physically relevant case of positive density with polynomial decay at infinity is considered.

Analysis of PDEs · Mathematics 2021-09-01 Eduard Feireisl , Antonin Novotny
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