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BEGIN:VEVENT
DTSTAMP:20210916T132450Z
LOCATION:Lise Girardin
DTSTART;TZID=Europe/Stockholm:20210707T110000
DTEND;TZID=Europe/Stockholm:20210707T113000
UID:submissions.pasc-conference.org_PASC21_sess145_msa349@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, Ghosh, Dorr, Dorf, Hittinger\n\nWe pres
 ent progress on the COGENT code, designed to simulate kinetic edge plasmas
  in tokamaks in complex geometries spanning both sides of the magnetic sep
 aratrix.  The high-order finite volume methods for the gyrokinetic sy
 stem and mapped multiblock geometries intrinsic to the code will be review
 ed.  The recent extension of the code to 5D (3D+2V), using a field-al
 igned grid to exploit the system’s extreme anisotropy, will be highl
 ighted.  This capability enables first-of-a-kind continuum simulation
 s of the ion temperature gradient (ITG) instability in the single-null geo
 metry.  The code’s multiphysics preconditioning framework will 
 be presented, along with examples of the implicit time-stepping of stiff t
 erms in the gyrokinetic Vlasov-Poisson system, including collisions and pa
 rallel advection.  We also report on progress incorporating newly dev
 eloped, high-order, sparse grid methods into the code to combat the proble
 m’s high dimensionality.\n\nDomain: CS and Math, Physics
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