Spectral treatment of gyrokinetic profile curvature
Abstract
Using a novel wavenumber-advection algorithm, we show that profile curvature (shear in the profile gradient) can be implemented with spectral accuracy in gyrokinetic turbulence simulations. Here, this approach enables a global simulation capability with the relatively low cost and high accuracy of local simulations. Using this new algorithm, we show that for a well-studied tokamak core test case, the effect of temperature-gradient curvature is below the threshold of detectability for experimentally-relevant values of curvature.
- Authors:
-
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1740022
- Grant/Contract Number:
- FC02-06ER54873; FG02-95ER54309; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Plasma Physics and Controlled Fusion
- Additional Journal Information:
- Journal Volume: 62; Journal Issue: 4; Journal ID: ISSN 0741-3335
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Gyrokinetic; turbulence; shear; global; spectral
Citation Formats
Candy, J., Belli, E. A., and Staebler, G.. Spectral treatment of gyrokinetic profile curvature. United States: N. p., 2020.
Web. doi:10.1088/1361-6587/ab759c.
Candy, J., Belli, E. A., & Staebler, G.. Spectral treatment of gyrokinetic profile curvature. United States. https://doi.org/10.1088/1361-6587/ab759c
Candy, J., Belli, E. A., and Staebler, G.. Wed .
"Spectral treatment of gyrokinetic profile curvature". United States. https://doi.org/10.1088/1361-6587/ab759c. https://www.osti.gov/servlets/purl/1740022.
@article{osti_1740022,
title = {Spectral treatment of gyrokinetic profile curvature},
author = {Candy, J. and Belli, E. A. and Staebler, G.},
abstractNote = {Using a novel wavenumber-advection algorithm, we show that profile curvature (shear in the profile gradient) can be implemented with spectral accuracy in gyrokinetic turbulence simulations. Here, this approach enables a global simulation capability with the relatively low cost and high accuracy of local simulations. Using this new algorithm, we show that for a well-studied tokamak core test case, the effect of temperature-gradient curvature is below the threshold of detectability for experimentally-relevant values of curvature.},
doi = {10.1088/1361-6587/ab759c},
journal = {Plasma Physics and Controlled Fusion},
number = 4,
volume = 62,
place = {United States},
year = {2020},
month = {2}
}
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