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We prove weak-strong uniqueness in the class of admissible measure-valued solutions for the isentropic Euler equations in any space dimension and for the Savage-Hutter model of granular flows in one and two space dimensions. For the latter…

Analysis of PDEs · Mathematics 2015-10-28 Piotr Gwiazda , Agnieszka Świerczewska-Gwiazda , Emil Wiedemann

We consider the weak solutions to the Euler-Fourier system describing the motion of a compressible heat conducting gas. Employing the method of convex integration, we show that the problem admits infinitely many global-in-time weak…

Analysis of PDEs · Mathematics 2014-08-26 Elisabetta Chiodaroli , Eduard Feireisl , Ondrej Kreml

We study the Riemann problem for the multidimensional compressible isentropic Euler equations. Using the framework developed by Chiodaroli, De Lellis, Kreml and based on the techniques of De Lellis and Sz\'{e}kelyhidi, we extend our…

Analysis of PDEs · Mathematics 2018-04-04 Elisabetta Chiodaroli , Ondřej Kreml

In this paper we extend and complement some recent results by Chiodaroli, De Lellis and Kreml on the well-posedness issue for weak solutions of the compressible isentropic Euler system in $2$ space dimensions with pressure law…

Analysis of PDEs · Mathematics 2014-08-26 Elisabetta Chiodaroli , Ondřej Kreml

We consider a class of wild initial data to the compressible Euler system that give rise to infinitely many admissible weak solutions via the method of convex integration. We identify the closure of this class in the natural $L^1$-topology…

Analysis of PDEs · Mathematics 2021-02-04 Eduard Feireisl , Christian Klingenberg , Simon Markfelder

This paper studies the global existence and uniqueness of strong solutions and its large-time behavior for the compressible isothermal Euler equations with a nonlocal dissipation. The system is rigorously derived from the kinetic…

Analysis of PDEs · Mathematics 2018-01-16 Young-Pil Choi

In this short note we partially extend the recent nonuniqueness results on admissible weak solutions to the Riemann problem for the 2D compressible isentropic Euler equations. We prove nonuniqueness of admissible weak solutions that start…

Analysis of PDEs · Mathematics 2017-07-04 Jan Březina , Elisabetta Chiodaroli , Ondřej Kreml

The dissipative solutions can be seen as a convenient generalization of the concept of weak solution to the isentropic Euler system. They can be seen as expectations of the Young measures associated to a suitable measure--valued solution of…

Analysis of PDEs · Mathematics 2019-03-29 Eduard Feireisl , Shyam Sundar Ghoshal , Animesh Jana

We consider rotational initial data for the two-dimensional incompressible Euler equations on an annulus. Using the convex integration framework, we show that there exist infinitely many admissible weak solutions (i.e. such with…

Analysis of PDEs · Mathematics 2015-06-15 Claude Bardos , László Székelyhidi , Emil Wiedemann

We deal with entropy solutions to the Cauchy problem for the isentropic compressible Euler equations in the space-periodic case. In more than one space dimension, the methods developed by De Lellis-Sz\'ekelyhidi enable us to show failure of…

Analysis of PDEs · Mathematics 2014-08-26 Elisabetta Chiodaroli

We establish the existence and uniqueness of smooth solutions with large vorticity and weak solutions with vortex sheets/entropy waves for the steady Euler equations for both compressible and incompressible fluids in arbitrary infinitely…

Analysis of PDEs · Mathematics 2019-02-19 Gui-Qiang G. Chen , Fei-Min Huang , Tian-Yi Wang , Wei Xiang

The collective behavior of animals can be modeled by a system of equations of continuum mechanics endowed with extra terms describing repulsive and attractive forces between the individuals. This system can be viewed as a generalization of…

Dynamical Systems · Mathematics 2016-11-24 Jan Březina , Václav Mácha

We consider the weak solution of the simplified Ericksen-Leslie system modeling compressible nematic liquid crystal flows in $\mathbb R^3$. When the initial data is small in $L^2$ and initial density is positive and essentially bounded, we…

Analysis of PDEs · Mathematics 2012-10-05 Guochun Wu , Zhong Tan

For the Euler equations of isentropic gas dynamics in one space dimension, also knowns as p-system in Lagrangian coordinate, it is known that the density can be arbitrarily close to zero as time goes to infinity, even when initial density…

Analysis of PDEs · Mathematics 2014-10-14 Geng Chen , Ronghua Pan , Shengguo Zhu

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

We consider the Euler equations for compressible fluids in a nozzle whose cross-section is variable and may contain discontinuities. We view these equations as a hyperbolic system in nonconservative form and investigate weak solutions in…

Numerical Analysis · Mathematics 2008-12-24 Dietmar Kroener , Philippe G. LeFloch , Mai-Duc Thanh

We consider the Cauchy problem for the barotropic Euler system coupled to Helmholtz or Poisson equations, in the whole space. We assume that the initial density is small enough, and that the initial velocity is close to some reference…

Analysis of PDEs · Mathematics 2019-06-20 Šárka Nečasová , Xavier Blanc , Raphaël Danchin , Bernard Ducomet , andš Nečasová

Compressible (full) potential flow is expressed as an equivalent first-order system of conservation laws for density $\rho$ and velocity $v$. Energy $E$ is shown to be the only nontrivial entropy for that system in multiple space…

Analysis of PDEs · Mathematics 2015-04-07 Volker Elling

A semi-implicit in time, entropy stable finite volume scheme for the compressible barotropic Euler system is designed and analyzed and its weak convergence to a dissipative measure-valued (DMV) solution [E. Feireisl et al., Dissipative…

Numerical Analysis · Mathematics 2023-12-07 K. R. Arun , Amogh Krishnamurthy

We discuss the problem of well-posedness of the compressible (barotropic) Euler system in the framework of weak solutions. The principle of maximal dissipation introduced by C.M. Dafermos is adapted and combined with the concept of…

Analysis of PDEs · Mathematics 2015-06-17 Eduard Feireisl