Regularity of Fluxes in Nonlinear Hyperbolic Balance Laws

Matania Ben-Artzi, Jiequan Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

This paper addresses the issue of the formulation of weak solutions to systems of nonlinear hyperbolic conservation laws as integral balance laws. The basic idea is that the “meaningful objects” are the fluxes, evaluated across domain boundaries over time intervals. The fundamental result in this treatment is the regularity of the flux trace in the multi-dimensional setting. It implies that a weak solution indeed satisfies the balance law. In fact, it is shown that the flux is Lipschitz continuous with respect to suitable perturbations of the boundary. It should be emphasized that the weak solutions considered here need not be entropy solutions. Furthermore, the assumption imposed on the flux f(u) is quite minimal—just that it is locally bounded.

Original languageEnglish
Pages (from-to)1289-1298
Number of pages10
JournalCommunications on Applied Mathematics and Computation
Volume5
Issue number3
DOIs
StatePublished - Sep 2023

Bibliographical note

Publisher Copyright:
© 2022, Shanghai University.

Keywords

  • Balance laws
  • Discontinuous solutions
  • Finite-volume schemes
  • Flux
  • Hyperbolic conservation laws
  • Multi-dimensional
  • Trace on boundary

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