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DTSTAMP:20250822T115808Z
LOCATION:Room 5.0B15 & 16
DTSTART;TZID=Europe/Stockholm:20250616T150000
DTEND;TZID=Europe/Stockholm:20250616T153000
UID:submissions.pasc-conference.org_PASC25_sess128_msa235@linklings.com
SUMMARY:A High-Order GPU-Accelerated Dynamical Core Based on Discontinous 
 Galerkin Methods
DESCRIPTION:Benedict Geihe (University of Cologne) and Michael Schlottke-L
 akemper (University of Augsburg)\n\nHigh-order discontinuous Galerkin (DG)
  methods offer the same level of accuracy as traditional methods while usi
 ng fewer degrees of freedom. At the same time, their increase in arithmeti
 c complexity occurs locally, leading to efficient algorithms with good sca
 lability and throughput, even on modern GPUs. In this talk we present our 
 current efforts in developing a novel, exascale-ready dynamical core for w
 eather and climate simulations, in which a DG scheme provides increased ac
 curacy and performance and supports efficient utilization of next generati
 on supercomputing hardware. Our approach is based on the flow solver Trixi
 .jl, which is built around a state-of-the-art spectral element method with
  entropy conserving flux differencing for improved robustness and with ada
 ptive mesh refinement for reduced time-to-solution. Written in the modern 
 high level language Julia, Trixi.jl provides rapid prototyping capabilitie
 s, HPC-grade scalability, and vendor-agnostic GPU support. Legacy applicat
 ions can utilize our methods via our interface library libtrixi, which pro
 vides APIs in C and Fortran. We will present results of simulations steere
 d by the Fortran code MESSy and show performance analyses of our CPU and G
 PU codes.\n\nDomain: Climate, Weather, and Earth Sciences, Computational M
 ethods and Applied Mathematics\n\nSession Chair: Farahnaz Khosrawi (Forsch
 ungszentrum Jülich)\n\n
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