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A cut discontinuous Galerkin method for the Laplace–Beltrami operator
University College London, UK.
Högskolan i Jönköping, Tekniska Högskolan, JTH, Produktutveckling. Högskolan i Jönköping, Tekniska Högskolan, JTH. Forskningsmiljö Produktutveckling - Simulering och optimering.ORCID-id: 0000-0001-7352-1550
Umeå University, Sweden.
Umeå University, Sweden.
2017 (engelsk)Inngår i: IMA Journal of Numerical Analysis, ISSN 0272-4979, E-ISSN 1464-3642, Vol. 37, nr 1, s. 138-169Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We develop a discontinuous cut finite element method for the Laplace–Beltrami operator on a hypersurface embedded in R. The method is constructed by using a discontinuous piecewise linear finite element space defined on a background mesh in R. The surface is approximated by a continuous piecewise linear surface that cuts through the background mesh in an arbitrary fashion. Then, a discontinuous Galerkin method is formulated on the discrete surface and in order to obtain coercivity, certain stabilization terms are added on the faces between neighbouring elements that provide control of the discontinuity as well as the jump in the gradient. We derive optimal a priori error and condition number estimates which are independent of the positioning of the surface in the background mesh. Finally, we present numerical examples confirming our theoretical results.

sted, utgiver, år, opplag, sider
Oxford University Press, 2017. Vol. 37, nr 1, s. 138-169
Emneord [en]
Surface PDE, Laplace–Beltrami, discontinuous Galerkin, Cut finite element method
HSV kategori
Identifikatorer
URN: urn:nbn:se:hj:diva-34834DOI: 10.1093/imanum/drv068ISI: 000397147700005Scopus ID: 2-s2.0-85020561306Lokal ID: JTHProduktutvecklingISOAI: oai:DiVA.org:hj-34834DiVA, id: diva2:1067744
Forskningsfinansiär
Swedish Foundation for Strategic Research , AM13-0029Swedish Research Council, 2011-4992; 2013-4708eSSENCE - An eScience CollaborationTilgjengelig fra: 2017-01-23 Laget: 2017-01-23 Sist oppdatert: 2018-10-16bibliografisk kontrollert

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