Multiwavelets and Jumps in DG Approximations

Mathea Vuik, Jennifer Ryan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

In general, solutions of nonlinear hyperbolic PDEs contain shocks or develop discontinuities. One option for improving the numerical treatment of the spurious oscillations that occur near these artifacts is through the application of a limiter. The cells where such treatment is necessary are referred to as troubled cells. In this article, we discuss the multiwavelet troubled-cell indicator that was introduced by Vuik and Ryan (J Comput Phys 270:138–160, 2014). We focus on the relation between the highest-level multiwavelet coefficients and jumps in (derivatives of) the DG approximation. Based on this information, we slightly modify the original multiwavelet troubled-cell indicator. Furthermore, we show one-dimensional test cases using the modified multiwavelet troubled-cell indicator.
Original languageEnglish
Title of host publicationSpectral and High Order Methods for Partial Differential Equations ICOSAHOM 2014
PublisherSpringer
Pages503-511
Number of pages9
Volume106
ISBN (Electronic)978-3-319-19800-2
ISBN (Print)978-3-319-19799-9
Publication statusPublished - Dec 2015

Publication series

NameLecture Notes in Computational Science and Engineering
PublisherSpringer

Keywords

  • discontinuous Galerkin
  • multi-wavelets
  • hyperbolic equations
  • discontinuity detection

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