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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.

 

Finite element approximation and preconditioning for anisothermal flow of implicitly-constituted non-Newtonian fluids
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by Patrick Farrell, Pablo Alexei Gazca Orozco and Endre Süli HTML | PDF
Math. Comp. 91 (2022), 659-697 Request permission

Abstract:

We devise 3-field and 4-field finite element approximations of a system describing the steady state of an incompressible heat-conducting fluid with implicit non-Newtonian rheology. We prove that the sequence of numerical approximations converges to a weak solution of the problem. We develop a block preconditioner based on augmented Lagrangian stabilisation for a discretisation based on the Scott–Vogelius finite element pair for the velocity and pressure. The preconditioner involves a specialised multigrid algorithm that makes use of a space decomposition that captures the kernel of the divergence and non-standard intergrid transfer operators. The preconditioner exhibits robust convergence behaviour when applied to the Navier–Stokes and power-law systems, including temperature-dependent viscosity, heat conductivity and viscous dissipation.
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Additional Information
  • Patrick Farrell
  • Affiliation: Mathematical Institute, University of Oxford, Oxford OX2 6GG, United Kingdom
  • MR Author ID: 873997
  • ORCID: 0000-0002-1241-7060
  • Email: patrick.farrell@maths.ox.ac.uk
  • Pablo Alexei Gazca Orozco
  • Affiliation: Mathematical Institute, University of Oxford, Oxford OX2 6GG, United Kingdom
  • Address at time of publication: Department of Mathematics, FAU Erlangen-Nürnberg, 91058 Erlangen, Germany
  • ORCID: 0000-0001-9859-4238
  • Email: alexei.gazca@math.fau.de
  • Endre Süli
  • Affiliation: Mathematical Institute, University of Oxford, Oxford OX2 6GG, United Kingdom
  • MR Author ID: 168795
  • ORCID: 0000-0002-0812-6105
  • Email: endre.suli@maths.ox.ac.uk
  • Received by editor(s): November 5, 2020
  • Received by editor(s) in revised form: May 28, 2021, and May 29, 2021
  • Published electronically: November 23, 2021
  • Additional Notes: This research was supported by the Engineering and Physical Sciences Research Council grant EP/R029423/1, and by the EPSRC Centre for Doctoral Training in Partial Differential Equations: Analysis and Applications, grant EP/L015811/1. The second author was supported by CONACyT (Scholarship 438269) and the Alexander von Humboldt Stiftung
  • © Copyright 2021 American Mathematical Society
  • Journal: Math. Comp. 91 (2022), 659-697
  • MSC (2020): Primary 65N30, 65F08; Secondary 65N55, 76A05
  • DOI: https://doi.org/10.1090/mcom/3703
  • MathSciNet review: 4379972