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Parallel adaptive discontinuous Galerkin discretizations in space and time for linear elastic and acousticwaves
Abstract
We introduce a space-time discretization for elastic and acoustic waves using a discontinuous Galerkin approximation in space and a Petrov–Galerkin scheme in time. For the dG method, the upwind flux is evaluated by explicitly solving a Riemann problem. Then we show well-posedness and convergence of the discrete system. Based on goal-oriented dualweighted error estimation an adaptive strategy is introduced. The full space-time linear system is solved with a parallel multilevel preconditioner. Numerical experiments for acoustic and elastic waves underline the efficiency of the overall adaptive solution process- doc-type:report
- Text
- info:eu-repo/semantics/book
- monograph
- info:eu-repo/semantics/publishedVersion
- space-time methods
- discontinuous Galerkin finite elements
- linear hyperbolic systems
- elastic and acoustic wave equation
- dual weighted residual error estimator
- ddc:510
- Mathematics
- info:eu-repo/classification/ddc/510