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Degree and Wavenumber [In]dependence of Schwarz Preconditioner for the DPG Method
[chapter]
2015
Lecture Notes in Computational Science and Engineering
This note describes an implementation of a discontinuous Petrov Galerkin (DPG) method for acoustic waves within the framework of high order finite elements provided by the software package NGSolve. A technique to impose the impedance boundary condition weakly is indicated. Numerical results from this implementation show that a multiplicative Schwarz algorithm, with no coarse solve, provides a p-preconditioner for solving the DPG system. The numerical observations suggest that the condition
doi:10.1007/978-3-319-19800-2_22
fatcat:vwrl52pg6ncczmvk35lbabiita