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DTSTAMP:20190719T085744Z
LOCATION:HG E 1.2
DTSTART;TZID=Europe/Stockholm:20190613T124500
DTEND;TZID=Europe/Stockholm:20190613T131500
UID:submissions.pasc-conference.org_PASC19_sess143_msa324@linklings.com
SUMMARY:ExaHyPE: Towards Earthquake Simulation Without Mesh Generation
DESCRIPTION:Minisymposium\nComputer Science and Applied Mathematics, Solid
  Earth Dynamics\n\nExaHyPE: Towards Earthquake Simulation Without Mesh Gen
 eration\n\nRannabauer, Duru, Gabriel, Bader\n\nExaHyPE (www.exahype.eu) is
  a Horizon 2020 EU project to develop a high-performance engine to solve h
 yperbolic systems of PDEs using the high-order discontinuous Galerkin fini
 te element method. The project's goals are to develop an engine with flexi
 ble support for various applications which shall be tailored towards expec
 ted exascale architectures. The project follows two new approaches both al
 lowing to omit the effort of boundary-fitting mesh generation, without hav
 ing to change the engine's internal Cartesian grid. We demonstrate a new c
 urvilinear mesh approach, which allows us to model complex topographies by
  mapping the domain from physical space to the internal Cartesian mesh. Th
 e scheme is accompanied by a novel Riemann solver (K. Duru et al., 2015) w
 hich realizes perfectly matched layers at the boundaries of our simulation
 . Second, we implemented a novel diffuse interface method which introduces
  a characteristic function to model topographies implicitly by identifying
  the location of solid and the surrounding air. The price-to-pay is that t
 he PDE system becomes nonlinear. We plan to present various comparisons of
  time to solution of both methods for this scenario.
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