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BEGIN:VEVENT
DTSTAMP:20210916T132450Z
LOCATION:Lise Girardin
DTSTART;TZID=Europe/Stockholm:20210706T140000
DTEND;TZID=Europe/Stockholm:20210706T143000
UID:submissions.pasc-conference.org_PASC21_sess133_msa162@linklings.com
SUMMARY:Challenges and Recent Advancements in Eulerian Gyrokinetic Edge Si
 mulations with GENE
DESCRIPTION:Minisymposium\n\nChallenges and Recent Advancements in Euleria
 n Gyrokinetic Edge Simulations with GENE\n\nGörler, Ball, Bañón Navarro, B
 runner, Crandall...\n\nGyrokinetic theory is currently considered the best
  compromise to tackle and better understand turbulence-induced anomalous t
 ransport in magnetically confined plasmas. Despite its underlying sophisti
 cated analytic optimizations, numerical simulations based on this 5D model
  remain challenging – particularly, at the plasma edge where strong 
 gradients, high magnetic shear, etc., increase the already substantial req
 uired numerical efforts. Corresponding codes such as the nonlinear gyrokin
 etic plasma turbulence code GENE considered here are hence forced to ident
 ify further optimizations and exploit modern supercomputers in a massively
  parallelized fashion. Originally designed as a so-called flux-tube code a
 nd then extended to radially global domains, it is now able to consider eq
 uilibrium variations in all spatial dimensions, therefore offering a hiera
 rchy of different domains and associated numerics for turbulence studies. 
 Here, selected optimizations such as domain adaptations for high magnetic 
 shear, block-structured velocity space grids and physics extensions such a
 s improved collision models together with some first results will be shown
 . Furthermore, strategies to approach and eventually cross the separatrix,
  e.g., via code-coupling and alternative coordinate systems will be discus
 sed. On the computational side, a successful porting of this Eulerian code
  to GPU architectures will be demonstrated and further strategies towards 
 exascale computing will be outlined.\n\nDomain: Physics
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