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DTSTART;TZID=Europe/Stockholm:20230626T150000
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UID:submissions.pasc-conference.org_PASC23_sess153_msa216@linklings.com
SUMMARY:Six-Dimensional Hybrid-Vlasov Modelling of the Earth's Magnetosphe
 re on LUMI
DESCRIPTION:Minisymposium\n\nYann Pfau-Kempf, Urs Ganse, Markus Battarbee,
  Konstantinos Papadakis, Leo Kotipalo, and Miro Palmu (University of Helsi
 nki) and Minna Palmroth (University of Helsinki, Finnish Meteorological In
 stitute)\n\nWe present an overview of current developments of the hybrid-V
 lasov model Vlasiator, which we use to model the Earth's magnetosphere in 
 the full 3D+3V position and velocity spaces. The use of static adaptive me
 sh refinement (AMR) for the spatial discretisation of the plasma's distrib
 ution function was demonstrated recently. In the natural next step, Vlasia
 tor now features dynamic AMR which allows to track physical features requi
 ring finer spatial resolution while they move across the simulation domain
 . The physical capabilities of the model were extended to include a couple
 d ionospheric inner boundary instead of the previously-used perfectly cond
 ucting inner boundary. We present preliminary investigations highlighting 
 the benefits of the more physically-accurate approach. We also present ins
 ight gained from profiling Vlasiator at scale using TAU on LUMI-C, includi
 ng performance gains obtained through fine-tuning the domain decomposition
  algorithm provided by the Zoltan library. Finally, we give a progress rep
 ort on the porting of Vlasiator to the GPU-accelerated LUMI-G partition.\n
 \nDomain: Engineering\n\nSession Chair: Jeremy Johnathan Williams (KTH Roy
 al Institute of Technology)
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