High-order finite-volume modeling of drift waves

JOURNAL OF COMPUTATIONAL PHYSICS

卷:373

Article

Dorf, M.¹  Dorr, M.¹  Hittinger, J.¹  Lee, W.²  Ghosh, D.¹ 

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Univ Calif San Diego, La Jolla, CA 92093 USA

关键词: Finite-volume method;    High-order discretization;    Incompressible flow;    Gyrokinetic simulation;    Drift waves;   

DOI  :  10.1016/j.jcp.2018.07.009

来源: Elsevier

【 摘 要 】

The paper discusses high-order finite-volume numerical modeling of drift waves, which is an ubiquitous phenomenon in magnetized plasmas. It is found that some standard discretization methods applied to the conservative form of the governing equations can lead to a numerical instability. A method to stabilize high-order discretization is proposed and demonstrated to work in numerical simulations performed with the fourth-order finite-volume code COGENT. As practical examples, a stable drift-wave solution with adiabatic electrons and the collisionless (universal) drift-wave instability driven by electron kinetic effects are considered. Application of the present analysis to a broader range of computational fluid dynamics systems is discussed. (C) 2018 Elsevier Inc. All rights reserved.

【 授权许可】

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