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research article

Mass lumping the dual cell method to arbitrary polynomial degree for acoustic and electromagnetic waves

Wess, Markus
•
Kapidani, Bernard  
•
Codecasa, Lorenzo
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September 15, 2024
Journal of Computational Physics

We present a fundamental improvement of a high polynomial degree time domain cell method recently introduced by the last three authors. The published work introduced a method featuring block-diagonal system matrices where the block size and conditioning scaled poorly with respect to polynomial degree. The issue is herein bypassed by the construction of new basis functions exploiting quadrature rule based mass lumping techniques for arbitrary polynomial degrees in two dimensions for the Maxwell equations and the acoustic wave equation in the first order velocity pressure formulation. We characterize the degrees of freedom of all new discrete approximation spaces we employ for differential forms and show that the resulting block diagonal (inverse) mass matrices have block sizes independent of the polynomial degree. We demonstrate on an extensive number of examples how the new technique is applicable and efficient for large scale computations.

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Type
research article
DOI
10.1016/j.jcp.2024.113196
Scopus ID

2-s2.0-85196147247

Author(s)
Wess, Markus

Technische Universität Wien

Kapidani, Bernard  

École Polytechnique Fédérale de Lausanne

Codecasa, Lorenzo

Politecnico di Milano

Schöberl, Joachim

Technische Universität Wien

Date Issued

2024-09-15

Published in
Journal of Computational Physics
Volume

513

Article Number

113196

Subjects

Cell method

•

Discontinuous Galerkin

•

Dual grids

•

High-order finite elements

•

Mass lumping

•

Time-domain Maxwell equations

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
MNS  
FunderFunding(s)Grant NumberGrant URL

Swiss National Science Foundation

200021_188589

Available on Infoscience
January 21, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/243146
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