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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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Error Estimates for well-balanced and time-split schemes on a locally damped wave equation
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by Debora Amadori and Laurent Gosse PDF
Math. Comp. 85 (2016), 601-633 Request permission

Abstract:

A posteriori $L^1$ error estimates are derived for both well-balanced (WB) and fractional-step (FS) numerical approximations of the unique weak solution of the Cauchy problem for the 1D semilinear damped wave equation. For setting up the WB algorithm, we proceed by rewriting it under the form of an elementary $3 \times 3$ system which linear convective structure allows to reduce the Godunov scheme with optimal Courant number (corresponding to $\Delta t=\Delta x$) to a wavefront-tracking algorithm free from any step of projection onto piecewise constant functions. A fundamental difference in the total variation estimates is proved, which partly explains the discrepancy of the FS method when the dissipative (sink) term displays an explicit dependence in the space variable. Numerical tests are performed by means of stationary exact solutions of the linear damped wave equation.
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Additional Information
  • Debora Amadori
  • Affiliation: DISIM, Università degli Studi dell’Aquila, 67100 L’Aquila, Italy
  • MR Author ID: 352024
  • Email: amadori@univaq.it
  • Laurent Gosse
  • Affiliation: IAC–CNR “Mauro Picone” (sezione di Roma) - Via dei Taurini, 19 - 00185 Rome, Italy
  • MR Author ID: 611045
  • Email: l.gosse@ba.iac.cnr.it
  • Received by editor(s): August 25, 2013
  • Received by editor(s) in revised form: September 1, 2013, March 16, 2014, and September 30, 2014
  • Published electronically: October 16, 2015
  • © Copyright 2015 American Mathematical Society
  • Journal: Math. Comp. 85 (2016), 601-633
  • MSC (2010): Primary 35L71, 65M15, 74J20
  • DOI: https://doi.org/10.1090/mcom/3043
  • MathSciNet review: 3434873