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Influence of the SIPG Penalisation on the Numerical Properties of Linear Systems for Elastic Wave Propagation

  • Uwe KöcherEmail author
Conference paper
Part of the Lecture Notes in Computational Science and Engineering book series (LNCSE, volume 126)

Abstract

Interior penalty discontinuous Galerkin discretisations (IPDG) and especially the symmetric variant (SIPG) for time-domain wave propagation problems are broadly accepted and widely used due to their advantageous properties. Linear systems with block structure arise by applying space-time discretisations and reducing the global system to time-slab problems. The design of efficient and robust iterative solvers for linear systems from interior penalty discretisations for hyperbolic wave equations is still a challenging task and relies on understanding the properties of the systems. In this work the numerical properties such as the condition number and the distribution of eigenvalues of different representations of the linear systems coming from space-time discretisations for elastic wave propagation are numerically studied. These properties for interior penalty discretisations depend on the penalisation and on the time interval length.

Notes

Acknowledgements

The author was partially supported by E.ON Stipendienfonds (Germany) under the grant T0087/29890/17 while visiting University of Bergen.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Helmut-Schmidt-University, University of the Federal Armed Forces HamburgDepartment of Mechanical EngineeringHamburgGermany

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