Non-uniqueness of delta shocks and contact discontinuities in the multi-dimensional model of Chaplygin gas

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F21%3A00539553" target="_blank" >RIV/67985840:_____/21:00539553 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1007/s00030-021-00672-0" target="_blank" >https://doi.org/10.1007/s00030-021-00672-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00030-021-00672-0" target="_blank" >10.1007/s00030-021-00672-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Non-uniqueness of delta shocks and contact discontinuities in the multi-dimensional model of Chaplygin gas

Popis výsledku v původním jazyce

We study the Riemann problem for the isentropic compressible Euler equations in two space dimensions with the pressure law describing the Chaplygin gas. It is well known that there are Riemann initial data for which the 1D Riemann problem does not have a classical BV solution, instead a δ-shock appears, which can be viewed as a generalized measure-valued solution with a concentration measure in the density component. We prove that in the case of two space dimensions there exist infinitely many bounded admissible weak solutions starting from the same initial data. Moreover, we show the same property also for a subset of initial data for which the classical 1D Riemann solution consists of two contact discontinuities. As a consequence of the latter result we observe that any criterion based on the principle of maximal dissipation of energy will not pick the classical 1D solution as the physical one. In particular, not only the criterion based on comparing dissipation rates of total energy but also a stronger version based on comparing dissipation measures fails to pick the 1D solution.

Název v anglickém jazyce

Non-uniqueness of delta shocks and contact discontinuities in the multi-dimensional model of Chaplygin gas

Popis výsledku anglicky

We study the Riemann problem for the isentropic compressible Euler equations in two space dimensions with the pressure law describing the Chaplygin gas. It is well known that there are Riemann initial data for which the 1D Riemann problem does not have a classical BV solution, instead a δ-shock appears, which can be viewed as a generalized measure-valued solution with a concentration measure in the density component. We prove that in the case of two space dimensions there exist infinitely many bounded admissible weak solutions starting from the same initial data. Moreover, we show the same property also for a subset of initial data for which the classical 1D Riemann solution consists of two contact discontinuities. As a consequence of the latter result we observe that any criterion based on the principle of maximal dissipation of energy will not pick the classical 1D solution as the physical one. In particular, not only the criterion based on comparing dissipation rates of total energy but also a stronger version based on comparing dissipation measures fails to pick the 1D solution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10101 - Pure mathematics

Projekt

<a href="/cs/project/GJ17-01694Y" target="_blank" >GJ17-01694Y: Matematická analýza parciálních diferenciálních rovnic popisujících nevazké proudění</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nodea-Nonlinear Differential Equations and Applications

ISSN

1021-9722

e-ISSN

1420-9004

Svazek periodika

28

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

24

Strana od-do

13

Kód UT WoS článku

000614045900001

EID výsledku v databázi Scopus

2-s2.0-85100334553