Speaker
Fabio Credali
(King Abdullah University of Science and Technology)
Description
We consider the fictitious domain formulation for elliptic interface problems introduced in [1]. The linear system arising from the mixed finite element discretization exhibits a double saddle-point structure, which makes it challenging to solve.
In this talk, we discuss the application of transforming smoothers [2] as an effective preconditioning technique.
References
[1] D. Boffi, L. Gastaldi, M. Ruggeri. Mixed formulation for interface problems with distributed Lagrange multiplier. Computers & Mathematics with Applications 68.12 (2014): 2151-2166.
[2] G. Wittum. Multi-grid methods for Stokes and Navier-Stokes equations: Transforming smoothers: Algorithms and numerical results. Numerische Mathematik 54.5 (1989): 543-563.
Authors
Dr
Najwa Alshehri
(Jubail Industrial College)
Daniele Boffi
(King Abdullah University of Science and Technology, University of Pavia)
Fabio Credali
(King Abdullah University of Science and Technology)