For the pure biharmonic equation and a biharmonic singular perturbation problem, a residual-based error estimator is introduced which applies to many existing nonconforming finite elements. The error estimator involves the local best-approximation error of the finite element function by piecewise polynomial functions of the degree determining the expected approximation order, which need not coincide with the maximal polynomial degree of the element, for example if bubble functions are used. The error estimator is shown to be reliable and locally efficient up to this polynomial best-approximation error and oscillations of the right-hand side.
Keywords: nonconforming finite element, singular perturbation, biharmonic, a posteriori error estimation
Dietmar Gallistl 1; Shudan Tian 2
@article{SMAI-JCM_2024__10__355_0, author = {Dietmar Gallistl and Shudan Tian}, title = {A posteriori error estimates for nonconforming discretizations of singularly perturbed biharmonic operators}, journal = {The SMAI Journal of computational mathematics}, pages = {355--372}, publisher = {Soci\'et\'e de Math\'ematiques Appliqu\'ees et Industrielles}, volume = {10}, year = {2024}, doi = {10.5802/smai-jcm.115}, language = {en}, url = {https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.115/} }
TY - JOUR AU - Dietmar Gallistl AU - Shudan Tian TI - A posteriori error estimates for nonconforming discretizations of singularly perturbed biharmonic operators JO - The SMAI Journal of computational mathematics PY - 2024 SP - 355 EP - 372 VL - 10 PB - Société de Mathématiques Appliquées et Industrielles UR - https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.115/ DO - 10.5802/smai-jcm.115 LA - en ID - SMAI-JCM_2024__10__355_0 ER -
%0 Journal Article %A Dietmar Gallistl %A Shudan Tian %T A posteriori error estimates for nonconforming discretizations of singularly perturbed biharmonic operators %J The SMAI Journal of computational mathematics %D 2024 %P 355-372 %V 10 %I Société de Mathématiques Appliquées et Industrielles %U https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.115/ %R 10.5802/smai-jcm.115 %G en %F SMAI-JCM_2024__10__355_0
Dietmar Gallistl; Shudan Tian. A posteriori error estimates for nonconforming discretizations of singularly perturbed biharmonic operators. The SMAI Journal of computational mathematics, Volume 10 (2024), pp. 355-372. doi : 10.5802/smai-jcm.115. https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.115/
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