Algebraic entropy fixes and convex limiting for continuous finite element discretizations of scalar hyperbolic conservation laws

Dmitri Kuzmin, Manuel Quezada de Luna

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this work, we modify a continuous Galerkin discretization of a scalar hyperbolic conservation law using new algebraic correction procedures. Discrete entropy conditions are used to determine the minimal amount of entropy stabilization and constrain antidiffusive corrections of a property-preserving low-order scheme. The addition of a second-order entropy dissipative component to the antidiffusive part of a nearly entropy conservative numerical flux is generally insufficient to prevent violations of local bounds in shock regions. Our monolithic convex limiting technique adjusts a given target flux in a manner which guarantees preservation of invariant domains, validity of local maximum principles, and entropy stability. The new methodology combines the advantages of modern entropy stable/entropy conservative schemes and their local extremum diminishing counterparts. The process of algebraic flux correction is based on inequality constraints which provably provide the desired properties. No free parameters are involved. The proposed algebraic fixes are readily applicable to unstructured meshes, finite element methods, general time discretizations, and steady-state residuals. Numerical studies of explicit entropy-constrained schemes are performed for linear and nonlinear test problems.
Original languageEnglish (US)
Pages (from-to)113370
JournalComputer Methods in Applied Mechanics and Engineering
Volume372
DOIs
StatePublished - Aug 25 2020

Fingerprint Dive into the research topics of 'Algebraic entropy fixes and convex limiting for continuous finite element discretizations of scalar hyperbolic conservation laws'. Together they form a unique fingerprint.

Cite this