A multimesh finite element method for the Stokes problem
2020 (English)In: Numerical methods for flows: FEF 2017 selected contributions / [ed] Harald van Brummelen; Alessandro Corsini; Simona Perotto; Gianluigi Rozza, Springer, 2020, p. 189-198Conference paper, Published paper (Refereed)
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.
Place, publisher, year, edition, pages
Springer, 2020. p. 189-198
Series
Lecture Notes in Computational Science and Engineering, ISSN 1439-7358, E-ISSN 2197-7100 ; 132
Keywords [en]
CutFEM, FEM, Multimesh, Nitsche, Non-matching mesh, Unfitted mesh
National Category
Computational Mathematics
Identifiers
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 (print)ISBN: 978-3-030-30704-2 (print)ISBN: 978-3-030-30705-9 (electronic)OAI: oai:DiVA.org:umu-197949DiVA, id: diva2:1682182
Conference
FEF 2017, 19th International Conference on Finite Elements in Flow Problems, Rome, Italy, April 5-7, 2017
2022-07-082022-07-082023-03-24Bibliographically approved