München 2019 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 6: Numerical Relativity

GR 6.6: Vortrag

Mittwoch, 20. März 2019, 12:45–13:00, HS 4

A discontinuous Galerkin elliptic solver with task-based parallelism for the SpECTRE code — •Nils Fischer — Max-Planck-Institut für Gravitationsphysik (AEI) Potsdam, Deutschland

I report on progress on the next-generation pseudo-spectral numerical relativity code SpECTRE, currently in development by the SXS collaboration. It combines nodal discontinuous Galerkin methods and task-based parallelism to achieve more accurate solutions for challenging relativistic astrophysics problems such as core-collapse supernovae and binary neutron star mergers. In particular, I present the numerical scheme to solve elliptic partial differential equations in SpECTRE. Since equations of this type appear in general relativistic initial data problems, they serve as the starting point for time evolutions. I demonstrate the code's ability to scale to the capacity of the Minerva supercomputer at AEI Potsdam.