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DTSTART:19700308T020000
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DTSTAMP:20250822T115805Z
LOCATION:Room 5.0B56
DTSTART;TZID=Europe/Stockholm:20250617T113000
DTEND;TZID=Europe/Stockholm:20250617T120000
UID:submissions.pasc-conference.org_PASC25_sess122_msa213@linklings.com
SUMMARY:Communication-Avoiding Lagrangian-Eulerian Discretization for the 
 Vlasov Equation
DESCRIPTION:Katharina Kormann, Shubam Goswami, Martin Kronbichler, and Til
 euzhan Mukhamet (Ruhr University Bochum)\n\nThis talk will discuss two eff
 iciency-enhancements of the discontinuous Galerkin solution of the Vlasov 
 equation: communication-avoiding boundary exchange as well as an arbitrary
  Lagrangian-Eulerian implementation of the gyration about the magnetic fie
 ld lines. The communication of boundary data in a distributed solution con
 stitute a major bottleneck in the solution of high-dimensional problems du
 e to the increased surface-to-volume ratio. We will discuss a reduced comm
 unication rate combined with extrapolated boundary data. On the other hand
 , we combine the Lagrangian treatment of the vxB term with a DG treatment 
 of the rest of the equation to enable increased time steps.\n\nDomain: Phy
 sics, Computational Methods and Applied Mathematics\n\nSession Chair: Eric
  Sonnendrücker (Max Planck Institute for Plasma Physics, Technical Univers
 ity of Munich)\n\n
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