In this paper we consider the multi-dimensional pressureless Euler system and we tackle the problem of existence and uniqueness of sticky particle solutions for general measure-type initial data. Although explicit counterexamples to both existence and uniqueness are known since [6], the problem of whether one can still find sticky particle solutions for a large set of data and of how one can select them was up to our knowledge still completely open. In this paper we prove that for a comeager set of initial data in the weak topology the pressureless Euler system admits a unique sticky particle solution given by a free flow where trajectories are disjoint straight lines.Indeed, such an existence and uniqueness result holds for a broader class of solutions decreasing their kinetic energy, which we call dissipative solutions, and which turns out to be the compact weak closure of the classical sticky particle solutions. Therefore any scheme for which the energy is l.s.c. and is dissipated will converge, for a comeager set of data, to our solution, i.e. the free flow.& COPY; 2023 Elsevier Inc. All rights reserved.

On the sticky particle solutions to the multi-dimensional pressureless Euler equations / Bianchini, Stefano; Daneri, Sara. - In: JOURNAL OF DIFFERENTIAL EQUATIONS. - ISSN 0022-0396. - 368:(2023), pp. 173-202. [10.1016/j.jde.2023.05.034]

On the sticky particle solutions to the multi-dimensional pressureless Euler equations

Bianchini, Stefano
;
2023-01-01

Abstract

In this paper we consider the multi-dimensional pressureless Euler system and we tackle the problem of existence and uniqueness of sticky particle solutions for general measure-type initial data. Although explicit counterexamples to both existence and uniqueness are known since [6], the problem of whether one can still find sticky particle solutions for a large set of data and of how one can select them was up to our knowledge still completely open. In this paper we prove that for a comeager set of initial data in the weak topology the pressureless Euler system admits a unique sticky particle solution given by a free flow where trajectories are disjoint straight lines.Indeed, such an existence and uniqueness result holds for a broader class of solutions decreasing their kinetic energy, which we call dissipative solutions, and which turns out to be the compact weak closure of the classical sticky particle solutions. Therefore any scheme for which the energy is l.s.c. and is dissipated will converge, for a comeager set of data, to our solution, i.e. the free flow.& COPY; 2023 Elsevier Inc. All rights reserved.
2023
368
173
202
https://arxiv.org/abs/2004.06557
Bianchini, Stefano; Daneri, Sara
File in questo prodotto:
File Dimensione Formato  
Sticky13042020.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Non specificato
Dimensione 372.4 kB
Formato Adobe PDF
372.4 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/135410
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 1
social impact