Inf-sup stable nonconforming finite elements of higher order on quadrilaterals and hexahedra
Matthies, Gunar
ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 41 (2007), p. 855-874 / Harvested from Numdam

We present families of scalar nonconforming finite elements of arbitrary order r1 with optimal approximation properties on quadrilaterals and hexahedra. Their vector-valued versions together with a discontinuous pressure approximation of order r-1 form inf-sup stable finite element pairs of order r for the Stokes problem. The well-known elements by Rannacher and Turek are recovered in the case r=1. A numerical comparison between conforming and nonconforming discretisations will be given. Since higher order nonconforming discretisation on quadrilaterals and hexahedra have less unknowns and much less non-zero matrix entries compared to corresponding conforming methods, these methods are attractive for numerical simulations.

Publié le : 2007-01-01
DOI : https://doi.org/10.1051/m2an:2007034
Classification:  65N12,  65N30
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     author = {Matthies, Gunar},
     title = {Inf-sup stable nonconforming finite elements of higher order on quadrilaterals and hexahedra},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique},
     volume = {41},
     year = {2007},
     pages = {855-874},
     doi = {10.1051/m2an:2007034},
     mrnumber = {2363886},
     zbl = {pre05289352},
     zbl = {1147.65094},
     language = {en},
     url = {http://dml.mathdoc.fr/item/M2AN_2007__41_5_855_0}
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Matthies, Gunar. Inf-sup stable nonconforming finite elements of higher order on quadrilaterals and hexahedra. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Tome 41 (2007) pp. 855-874. doi : 10.1051/m2an:2007034. http://gdmltest.u-ga.fr/item/M2AN_2007__41_5_855_0/

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