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DTSTAMP:20220812T074335Z
LOCATION:Darwin Room
DTSTART;TZID=Europe/Stockholm:20220629T150000
DTEND;TZID=Europe/Stockholm:20220629T153000
UID:submissions.pasc-conference.org_PASC22_sess153_msa261@linklings.com
SUMMARY:Continuum Kinetic Simulations of Tokamak Edge Plasmas with COGENT
DESCRIPTION:Minisymposium\n\nContinuum Kinetic Simulations of Tokamak Edge
  Plasmas with COGENT\n\nRicketson, Dorr, Dorf, Ghosh\n\nWe present progres
 s on the COGENT code, designed to simulate kinetic edge plasmas in tokamak
 s in complex geometries spanning both sides of the magnetic separatrix.  T
 he high-order finite volume methods for the gyrokinetic system and mapped 
 multiblock geometries intrinsic to the code will be reviewed.  We will hig
 hlight the code’s capabilities through examples of complex physical simula
 tions.  The code’s multiphysics preconditioning framework will be presente
 d, along with examples of the implicit time-stepping  -- and the tailored 
 preconditioning that necessitates -- of stiff terms in the gyrokinetic Vla
 sov-Poisson system, including collisions and parallel advection.  We also 
 present the implementation of newly-developed high-order sparse grid metho
 ds in the code to combat the problem’s high dimensionality.  <br /><br />*
 This material is based on work supported by the U.S. Department of Energy,
  Office of Science, Office of Advanced Scientific Computing Research, Appl
 ied Mathematics Program under Contract DE-AC52-07NA27344 at Lawrence Liver
 more National Laboratory.\n\nDomain: Computer Science and Applied Mathemat
 ics, Physics
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