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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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Inf-sup stability of the trace $\mathbf {P}_2$–$P_1$ Taylor–Hood elements for surface PDEs
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by Maxim A. Olshanskii, Arnold Reusken and Alexander Zhiliakov HTML | PDF
Math. Comp. 90 (2021), 1527-1555 Request permission

Abstract:

The paper studies a geometrically unfitted finite element method (FEM), known as trace FEM or cut FEM, for the numerical solution of the Stokes system posed on a closed smooth surface. A trace FEM based on standard Taylor–Hood (continuous $\mathbf P_2$–$P_1$) bulk elements is proposed. A so-called volume normal derivative stabilization, known from the literature on trace FEM, is an essential ingredient of this method. The key result proved in the paper is an inf-sup stability of the trace $\mathbf P_2$–$P_1$ finite element pair, with the stability constant uniformly bounded with respect to the discretization parameter and the position of the surface in the bulk mesh. Optimal order convergence of a consistent variant of the FEM follows from this new stability result and interpolation properties of the trace FEM. Properties of the method are illustrated with numerical examples.
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Additional Information
  • Maxim A. Olshanskii
  • Affiliation: Department of Mathematics, University of Houston, Houston, Texas 77204
  • MR Author ID: 343398
  • Email: molshan@math.uh.edu
  • Arnold Reusken
  • Affiliation: Institut für Geometrie und Praktische Mathematik, RWTH-Aachen University, D-52056 Aachen, Germany
  • MR Author ID: 147305
  • Email: reusken@igpm.rwth-aachen.de
  • Alexander Zhiliakov
  • Affiliation: Department of Mathematics, University of Houston, Houston, Texas 77204
  • MR Author ID: 1331093
  • Email: alex@math.uh.edu
  • Received by editor(s): September 24, 2019
  • Received by editor(s) in revised form: February 27, 2020, and March 19, 2020
  • Published electronically: March 16, 2021
  • Additional Notes: The first and third authors were partially supported by NSF through the Division of Mathematical Sciences grant 1717516.
  • © Copyright 2021 American Mathematical Society
  • Journal: Math. Comp. 90 (2021), 1527-1555
  • MSC (2020): Primary 58J32, 65N12, 65N15, 65N30, 76D07
  • DOI: https://doi.org/10.1090/mcom/3551
  • MathSciNet review: 4273108