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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.

What is MCQ? The Mathematical Citation Quotient (MCQ) measures journal impact by looking at citations over a five-year period. Subscribers to MathSciNet may click through for more detailed information.

 

Strictly convex entropy and entropy stable schemes for reactive Euler equations
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by Weifeng Zhao HTML | PDF
Math. Comp. 91 (2022), 735-760 Request permission

Abstract:

This paper presents entropy analysis and entropy stable (ES) finite difference schemes for the reactive Euler equations with chemical reactions. For such equations we point out that the thermodynamic entropy is no longer strictly convex. To address this issue, we propose a strictly convex entropy function by adding an extra term to the thermodynamic entropy. Thanks to the strict convexity of the proposed entropy, the Roe-type dissipation operator in terms of the entropy variables can be formulated. Furthermore, we construct two sets of second-order entropy preserving (EP) numerical fluxes for the reactive Euler equations. Based on the EP fluxes and the Roe-type dissipation operators, high-order EP/ES fluxes are derived. Numerical experiments validate the designed accuracy and good performance of our schemes for smooth and discontinuous initial value problems. The entropy decrease of ES schemes is verified as well.
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Additional Information
  • Weifeng Zhao
  • Affiliation: Department of Applied Mathematics, University of Science and Technology Beijing, Beijing 100083, People’s Republic of China
  • ORCID: 0000-0003-4893-1982
  • Email: wfzhao@ustb.edu.cn
  • Received by editor(s): June 26, 2021
  • Published electronically: January 25, 2022
  • © Copyright 2022 American Mathematical Society
  • Journal: Math. Comp. 91 (2022), 735-760
  • MSC (2020): Primary 65M06; Secondary 76M20
  • DOI: https://doi.org/10.1090/mcom/3721
  • MathSciNet review: 4379974