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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.

 

Uniform convergence of an upwind discontinuous Galerkin method for solving scaled discrete-ordinate radiative transfer equations with isotropic scattering
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by Qiwei Sheng and Cory D. Hauck HTML | PDF
Math. Comp. 90 (2021), 2645-2669

Abstract:

We present an error analysis for the discontinuous Galerkin (DG) method applied to the discrete-ordinate discretization of the steady-state radiative transfer equation with isotropic scattering. Under some mild assumptions, we show that the DG method converges uniformly with respect to a scaling parameter $\varepsilon$ which characterizes the strength of scattering in the system. However, the rate is not optimal and can be polluted by the presence of boundary layers. In one-dimensional slab geometries, we demonstrate optimal convergence when boundary layers are not present and analyze a simple strategy for balance interior and boundary layer errors. Some numerical tests are also provided in this reduced setting.
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Additional Information
  • Qiwei Sheng
  • Affiliation: Department of Mathematics, California State Univeristy, Bakersfield, California 93311
  • MR Author ID: 1022258
  • ORCID: 0000-0002-4637-8856
  • Email: qsheng@csub.edu
  • Cory D. Hauck
  • Affiliation: Multiscale Methods Group, Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
  • MR Author ID: 748066
  • Email: hauckc@ornl.gov
  • Received by editor(s): September 25, 2020
  • Received by editor(s) in revised form: March 31, 2021
  • Published electronically: July 19, 2021
  • Additional Notes: This material was based, in part, upon work supported by the DOE Office of Advanced Scientific Computing Research and by the National Science Foundation under Grant No. 1217170. ORNL is operated by UT-Battelle, LLC., for the U.S. Department of Energy under Contract DE-AC05-00OR22725. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for the United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan)
  • © Copyright 2021 Qiwei Sheng and Cory D. Hauck
  • Journal: Math. Comp. 90 (2021), 2645-2669
  • MSC (2020): Primary 65N12, 65N30, 35B40, 35B45, 35L40
  • DOI: https://doi.org/10.1090/mcom/3670
  • MathSciNet review: 4305364