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

JOURNAL OF COMPUTATIONAL PHYSICS

卷:391

Article

Barnes, M.^1,2  Parra, F., I^1,2  Landreman, M.³ 

[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3PU, England

[2] Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England

[3] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA

关键词: Gyrokinetics;    Turbulence;    Transport;    Stellarator;    Magnetic confinement fusion;   

DOI  :  10.1016/j.jcp.2019.01.025

来源: Elsevier

【 摘 要 】

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 calledstella, 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. (C) 2019 The Authors. Published by Elsevier Inc. All rights reserved.

【 授权许可】

Free