stella: An operator-split, implicit–explicit δf-gyrokinetic code for general magnetic field configurations

M. Barnes, F. I. Parra, M. Landreman

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Here we present details of an operator-split, implicit–explicit numerical scheme for the solution of the gyrokinetic-Poisson system of equations in the local limit. This scheme has been implemented in a new code called stella, which is capable of evolving electrostatic fluctuations with full kinetic electron effects and an arbitrary number of ion species in general magnetic geometry. We demonstrate the advantages of this mixed approach over a fully explicit treatment and provide linear and nonlinear benchmark comparisons for both axisymmetric and non-axisymmetric magnetic equilibria.

Original languageEnglish (US)
Pages (from-to)365-380
Number of pages16
JournalJournal of Computational Physics
Volume391
DOIs
StatePublished - Aug 15 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Numerical Analysis
  • Modeling and Simulation
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Mathematics
  • Applied Mathematics

Keywords

  • Gyrokinetics
  • Magnetic confinement fusion
  • Stellarator
  • Transport
  • Turbulence

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