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DTSTAMP:20210916T132529Z
LOCATION:Lise Girardin
DTSTART;TZID=Europe/Stockholm:20210707T110000
DTEND;TZID=Europe/Stockholm:20210707T130000
UID:submissions.pasc-conference.org_PASC21_sess145@linklings.com
SUMMARY:Towards Exascale Computing in Kinetic Simulations of Magnetic Fusi
 on Plasmas. Part III - Advanced Numerical Methods and Algorithms
DESCRIPTION:Minisymposium\n\nMagnetic fusion plasmas are subject to a plet
 hora of collective effects such as electromagnetic waves and instabilities
 , spanning multiple time- and length- scales. The low collisionality of re
 actor core plasmas makes a kinetic description mandatory for an accurate r
 epresentation. Ions and electrons have very different dynamics, and theref
 ore the problem is intrinsically multi-scale, both in space and time. As w
 e go towards the plasma edge, collisionality increases and the relative fl
 uctuation amplitudes become close to unity. In this Part III of the minisy
 mposium, we shall focus on the fact that relying on just  porting, and opt
 imizing existing codes on new generation computers will not be sufficient 
 to make  a global, full fusion reactor (‘from the magnetic axis to the wal
 l’) description  tractable. Ongoing developments in new innovative mathema
 tical representations, discretizations and algorithms are just as critical
 . Challenges  related to transitioning from reduced to more accurate descr
 iptions where needed will also be addressed, in particular considering the
  possible transition from fluid to gyrokinetic models as well as from gyro
 kinetic to fully kinetic.\n\nElectromagnetic Gyrokinetic Simulations with 
 Particle-in-Cell Codes\n\nMishchenko, Koenies, Kleiber, Hatzky, Bottino...
 \n\nElectromagnetic gyrokinetic particle-in-cell simulations have been inh
 ibited for a long time by numerical problems. These problems are related t
 o a subtle numerical cancellation in the field equations which has to happ
 en in such simulations. This cancellation appears to be very difficult to 
 achieve ...\n\n---------------------\nA Gyrokinetic Moment-Based Method fo
 r the Periphery Plasmas of Fusion Devices\n\nFrei, Jorge, Ricci\n\nUnderst
 anding the turbulent dynamics of the plasma boundary of fusion devices - t
 he region close to the material walls, which includes the edge, the extern
 al part of the closed flux surface region, and the scrape-off layer, where
  the magnetic field lines intercept the machine vessel - is of crucial ...
 \n\n---------------------\nContinuum Kinetic Simulations of Tokamak Edge P
 lasmas with COGENT\n\nRicketson, Ghosh, Dorr, Dorf, Hittinger\n\nWe presen
 t progress on the COGENT code, designed to simulate kinetic edge plasmas i
 n tokamaks in complex geometries spanning both sides of the magnetic separ
 atrix.  The high-order finite volume methods for the gyrokinetic syst
 em and mapped multiblock geometries intrinsic to the code will be rev...\n
 \n---------------------\nhyper.deal: A discontinuous Galerkin library for 
 High-Dimensional Partial Differential Equations and its Application to the
  Vlasov Equation\n\nKormann, Münch, Kronbichler, Garnelo Abellanas\n\nIn t
 his talk, we will present the efficient, matrix-free finite-element librar
 y hyper.deal for solving partial differential equations in two to six dime
 nsions with high-order discontinuous Galerkin methods. It builds upon the 
 low-dimensional finite-element library deal.II to create complex low-dimen
 ...\n\n\nDomain: CS and Math, Physics
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