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Full gradient stabilized cut finite element methods for surface partial differential equations
Department of Mathematics, University College London, United Kingdom.
Jönköping University, School of Engineering, JTH, Product Development. Jönköping University, School of Engineering, JTH. Research area Product Development - Simulation and Optimization.ORCID iD: 0000-0001-7352-1550
Department of Mathematics and Mathematical Statistics, Umeå University, Sweden.
Department of Mathematics and Mathematical Statistics, Umeå University, Sweden.
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2016 (English)In: Computer Methods in Applied Mechanics and Engineering, ISSN 0045-7825, E-ISSN 1879-2138, Vol. 310, 278-296 p.Article in journal (Refereed) PublishedText
Abstract [en]

We propose and analyze a new stabilized cut finite element method for the Laplace–Beltrami operator on a closed surface. The new stabilization term provides control of the full R 3 gradient on the active mesh consisting of the elements that intersect the surface. Compared to face stabilization, based on controlling the jumps in the normal gradient across faces between elements in the active mesh, the full gradient stabilization is easier to implement and does not significantly increase the number of nonzero elements in the mass and stiffness matrices. The full gradient stabilization term may be combined with a variational formulation of the Laplace–Beltrami operator based on tangential or full gradients and we present a simple and unified analysis that covers both cases. The full gradient stabilization term gives rise to a consistency error which, however, is of optimal order for piecewise linear elements, and we obtain optimal order a priori error estimates in the energy and L 2 norms as well as an optimal bound of the condition number. Finally, we present detailed numerical examples where we in particular study the sensitivity of the condition number and error on the stabilization parameter.

Place, publisher, year, edition, pages
2016. Vol. 310, 278-296 p.
Keyword [en]
Surface PDE, Laplace–Beltrami operator, Cut finite element method, Stabilization, Condition number, A priori error estimates
National Category
Computational Mathematics
Identifiers
URN: urn:nbn:se:hj:diva-31178DOI: 10.1016/j.cma.2016.06.033ScopusID: 2-s2.0-84982710231Local ID: JTHProduktutvecklingISOAI: oai:DiVA.org:hj-31178DiVA: diva2:951242
Available from: 2016-08-08 Created: 2016-08-08 Last updated: 2016-09-05Bibliographically approved

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Hansbo, Peter
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JTH, Product DevelopmentJTH. Research area Product Development - Simulation and Optimization
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