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Mathematics of Computation

Published by the American Mathematical Society since 1960 (published as Mathematical Tables and other Aids to Computation 1943-1959), Mathematics of Computation is devoted to research articles of the highest quality in computational mathematics.

ISSN 1088-6842 (online) ISSN 0025-5718 (print)

The 2020 MCQ for Mathematics of Computation is 1.78.

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Application of modal filtering to a spectral difference method
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by Jan Glaubitz, Philipp Öffner and Thomas Sonar PDF
Math. Comp. 87 (2018), 175-207 Request permission

Abstract:

We adapt the spectral viscosity (SV) formulation implemented as a modal filter to a Spectral Difference Method (SD) solving hyperbolic conservation laws. In the SD Method we use selections of different orthogonal polynomials (APK polynomials). Furthermore we obtain new error bounds for filtered APK extensions of smooth functions. We demonstrate that the modal filter also depends on the chosen polynomial basis in the SD Method. Spectral filtering stabilizes the scheme and leaves weaker oscillations. Hence, the selection of the family of orthogonal polynomials on triangles and their specific modal filter possesses a positive influence on the stability and accuracy of the SD Method. In the second part, we initiate a stability analysis for a linear scalar test case with periodic initial condition to find the best selection of APK polynomials and their specific modal filter. To the best of our knowledge, this work is the first that gives a stability analysis for a scheme with spectral filtering. Finally, we demonstrate the influence of the underlying basis of APK polynomials in a well-known test case.
References
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Additional Information
  • Jan Glaubitz
  • Affiliation: Technische Universität Braunschweig, Institut Computational Mathematics, Pockelsstraße 14, D-38106 Braunschweig, Germany
  • Email: j.glaubitz@tu-bs.de
  • Philipp Öffner
  • Affiliation: Technische Universität Braunschweig, Institut Computational Mathematics, Pockelsstraße 14, D-38106 Braunschweig, Germany
  • Email: p.oeffner@tu-bs.de
  • Thomas Sonar
  • Affiliation: Technische Universität Braunschweig, Institut Computational Mathematics, Pockelsstraße 14, D-38106 Braunschweig, Germany
  • MR Author ID: 324309
  • Email: t.sonar@tu-bs.de
  • Received by editor(s): April 2, 2016
  • Received by editor(s) in revised form: September 13, 2016
  • Published electronically: August 7, 2017
  • © Copyright 2017 American Mathematical Society
  • Journal: Math. Comp. 87 (2018), 175-207
  • MSC (2010): Primary 65M12, 65M70; Secondary 42C10
  • DOI: https://doi.org/10.1090/mcom/3257
  • MathSciNet review: 3716193