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A multimesh finite element method for the Stokes problem
Simula Research Laboratory, Lysaker, Norway; Mathematics and Cybernetics, SINTEF Digital, Oslo, Norway.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för matematik och matematisk statistik.
Department of Mathematical Sciences, Chalmers University of Technology and University of Gothenburg, Göteborg, Sweden.
2020 (Engelska)Ingår i: Numerical methods for flows: FEF 2017 selected contributions / [ed] Harald van Brummelen; Alessandro Corsini; Simona Perotto; Gianluigi Rozza, Springer, 2020, s. 189-198Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The multimesh finite element method enables the solution of partial differential equations on a computational mesh composed by multiple arbitrarily overlapping meshes. The discretization is based on a continuous–discontinuous function space with interface conditions enforced by means of Nitsche’s method. In this contribution, we consider the Stokes problem as a first step towards flow applications. The multimesh formulation leads to so called cut elements in the underlying meshes close to overlaps. These demand stabilization to ensure coercivity and stability of the stiffness matrix. We employ a consistent least-squares term on the overlap to ensure that the inf-sup condition holds. We here present the method for the Stokes problem, discuss the implementation, and verify that we have optimal convergence.

Ort, förlag, år, upplaga, sidor
Springer, 2020. s. 189-198
Serie
Lecture Notes in Computational Science and Engineering, ISSN 1439-7358, E-ISSN 2197-7100 ; 132
Nyckelord [en]
CutFEM, FEM, Multimesh, Nitsche, Non-matching mesh, Unfitted mesh
Nationell ämneskategori
Beräkningsmatematik
Identifikatorer
URN: urn:nbn:se:umu:diva-197949DOI: 10.1007/978-3-030-30705-9_17Scopus ID: 2-s2.0-85081755541ISBN: 978-3-030-30704-2 (tryckt)ISBN: 978-3-030-30704-2 (tryckt)ISBN: 978-3-030-30705-9 (digital)OAI: oai:DiVA.org:umu-197949DiVA, id: diva2:1682182
Konferens
FEF 2017, 19th International Conference on Finite Elements in Flow Problems, Rome, Italy, April 5-7, 2017
Tillgänglig från: 2022-07-08 Skapad: 2022-07-08 Senast uppdaterad: 2023-03-24Bibliografiskt granskad

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Larson, Mats G.

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