ExaHyPE | ChEESE - Centre of Excellence for Exascale Supercomputing in the area of the Solid Earth

Code name	ExaHyPE
Developer(s)	Leonhard Rannabauer (TUM), Philipp Samfaß (TUM), Jean-Matthieu Gallard (TUM), Tobias Weinzierl (Durham University) and Anne Reinarz (Durham University) Contact person: Michael Bader
Link	https://www.exahype.org/
Short description	The ExaHyPE engine numerically solves systems of hyperbolic PDEs, as stemming from conservation laws. A concrete model for seismic wave propagation problems is being developed within the ExaHyPE project. The model is based on high-order Discontinuous Galerkin (DG) discretization, local time-stepping and works on tree-structured Cartesian meshes. The activities in this CoE will focus on setting up concrete services based on the ExaHyPE engine and seismic models.
Original code level	2
Current code level	2
Pilot(s) involved	PD1, PD4, PD5
Co-design	Co-design activities: Optimisation of backends for small tensor and matrix operations on various CPU architectures (Intel, AMD, ARM)
Main results and References	Modeling improvements: Automatic curvilinear mesh generation for domains with complicated topography Implementation of UQ-based scenarios for seismic hazard assessment
Performance results	Algorithmic and HPC improvements: Improved vectorization due to algorithmic modification of the ADER-DG scheme and change of memory layout (“Array of Struct of Array”) Reactive load balancing via task offloading and experiments with team-based resilience

ExaHyPE is an open source engine to solve hyperbolic partial differential equations in first order formulation on dynamically adaptive spacetree grids.