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The effect of background flow shear on gyrokinetic turbulence in the cold ion limit
Resource type
Authors/contributors
- Ball, Justin (Author)
- Brunner, Stephan (Author)
- McMillan, Ben F. (Author)
Title
The effect of background flow shear on gyrokinetic turbulence in the cold ion limit
Abstract
The cold ion limit of the local gyrokinetic model is rigorously taken to produce a nonlinear system of fluid equations that includes background flow shear. No fluid closure is required. By considering a simple slab geometry with magnetic drifts, but no magnetic shear, these fluid equations reduce to the Charney–Hasegawa–Mima model in the presence of flow shear. Analytic solutions to this model are found to study the impact of E × B flow shear on the stability of a single parallel velocity gradient driven mode. Additionally, the model is used to investigate the effect of background E × B flow shear on the basic three-mode nonlinear coupling, which reveals differences between zonal and non-zonal modes. These analytic results agree with gyrokinetic simulations and can serve to benchmark the numerical implementation of flow shear and nonlinear coupling.
Publication
Plasma Physics and Controlled Fusion
Volume
61
Issue
6
Pages
064004
Date
2019-04
Journal Abbr
Plasma Phys. Control. Fusion
Language
en
ISSN
0741-3335
Accessed
8/29/24, 10:21 AM
Library Catalog
Institute of Physics
Extra
5 citations (Crossref/DOI) [2024-10-03]
5 citations (Crossref/DOI) [2024-10-02]
Publisher: IOP Publishing
Citation
Ball, J., Brunner, S., & McMillan, B. F. (2019). The effect of background flow shear on gyrokinetic turbulence in the cold ion limit. Plasma Physics and Controlled Fusion, 61(6), 064004. https://doi.org/10.1088/1361-6587/ab1320
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