A Galerkin method for the weak formulation of current diffusion and force balance in tokamak plasmas

JOURNAL OF COMPUTATIONAL PHYSICS

卷:442

Article

关键词: Current diffusion;    Plasma equilibrium;    Tokamak;   

DOI  :  10.1016/j.jcp.2021.110483

来源: Elsevier

【 摘 要 】

This paper presents a new numerical approach to the simulation of plasma equilibrium evolution in tokamaks. It is based on an unusual coupling formulation of current diffusion and axi-symmetric equilibrium equations that does not require the use of flux-surface averages and allows for fast Newton-type iterations schemes. A detailed derivation of the coupled system of non-linear equations and its discretization is provided. Numerical examples, based on an implementation in the free-boundary equilibrium code FEEQS, highlight feasibility and applicability. (C) 2021 Elsevier Inc. All rights reserved.

【 授权许可】

Free