Spectral treatment of gyrokinetic profile curvature
Journal Article
·
· Plasma Physics and Controlled Fusion
- General Atomics, San Diego, CA (United States); General Atomics, Energy & Advanced Concepts, DIII-D
- General Atomics, San Diego, CA (United States)
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.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- FC02-06ER54873; FG02-95ER54309; AC05-00OR22725
- OSTI ID:
- 1740022
- Alternate ID(s):
- OSTI ID: 23027371
- Journal Information:
- Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 4 Vol. 62; ISSN 0741-3335
- Publisher:
- IOP ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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