A posteriori error estimates of characteristic mixed finite elements for convection-diffusion control problems

Abstract: In this article, we consider fully discrete characteristic mixed finite elements for convection-diffusion optimal control problems. We use the characteristic line method to treat the hyperbolic part of the state equation as a directional derivative. The state and the co-state are discretized by the lowest order Raviart-Thomas mixed finite element spaces and the control is approximated by piecewise constant functions. Using some proper duality problems, we derive a posteriori error estimates for the scalar functions. Such estimates are not available in the literature. A numerical example is presented to validate the theoretical results.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
A posteriori error estimates of characteristic mixed finite elements for convection-diffusion control problems ; volume:20 ; number:1 ; year:2022 ; pages:629-645 ; extent:17
Open mathematics ; 20, Heft 1 (2022), 629-645 (gesamt 17)

Urheber
Tang, Yuelong
Hua, Yuchun

DOI
10.1515/math-2022-0053
URN
urn:nbn:de:101:1-2022082114020926921479
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:35 MESZ

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Beteiligte

  • Tang, Yuelong
  • Hua, Yuchun

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