A Cut Finite Element Method with Boundary Value Correction for the Incompressible Stokes Equations
We design a cut finite element method for the incompressible Stokes equations on domains with curved boundary. The cut finite element method allows for the domain boundary to cut through the elements of the computational mesh in a very general fashion. To further facilitate the implementation we propose to use a piecewise affine discrete domain even if the physical domain has curved boundary. Dirichlet boundary conditions are imposed using Nitsche’s method on the discrete boundary and the effect of the curved physical boundary is accounted for using the boundary value correction technique introduced for cut finite element methods in Burman et al. (Math Comput 87(310):633–657, 2018).
This research was supported in part by EPSRC grant EP/P01576X/1, the Swedish Foundation for Strategic Research Grant No. AM13-0029, the Swedish Research Council Grants Nos. 2013-4708, 2017-03911, and the Swedish Research Programme Essence.
- 2.D. Boffi, F. Brezzi, M. Fortin, Mixed Finite Element Methods and Applications. Springer Series in Computational Mathematics, vol. 44 (Springer, Heidelberg, 2013)Google Scholar
- 8.J. Guzmán, M. Olshanskii, Inf-sup stability of geometrically unfitted Stokes finite elements. Math. Comput. 87, 2091–2112 (2018). http://dx.doi.org/10.1090/mcom/3288Google Scholar