Momentum flux parasitic to free-energy transfer
Abstract
An often-neglected portion of the radial $$\boldsymbol{E}\times \boldsymbol{B}$$ drift is shown to drive an outward flux of co-current momentum when free energy is transferred from the electrostatic potential to ion parallel flows. This symmetry breaking is fully nonlinear, not quasilinear, necessitated simply by free-energy balance in parameter regimes for which significant energy is dissipated via ion parallel flows. The resulting rotation peaking is counter-current and has a scaling and order of magnitude that are comparable with experimental observations. Finally, the residual stress becomes inactive when frequencies are much higher than the ion transit frequency, which may explain the observed relation of density peaking and counter-current rotation peaking in the core.
- Authors:
-
- Princeton Univ., NJ (United States)
- Max-Planck-Inst. fur Plasmaphysik, Garching (Germany)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1426203
- Report Number(s):
- PPPL-5329
Journal ID: ISSN 0029-5515; TRN: US1802264
- Grant/Contract Number:
- AC02-09CH11466
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 57; Journal Issue: 8; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; toroidal rotation; tokamak; intrinsic rotation; rotation reversal; transport
Citation Formats
Stoltzfus-Dueck, T., and Scott, B. Momentum flux parasitic to free-energy transfer. United States: N. p., 2017.
Web. doi:10.1088/1741-4326/aa7289.
Stoltzfus-Dueck, T., & Scott, B. Momentum flux parasitic to free-energy transfer. United States. https://doi.org/10.1088/1741-4326/aa7289
Stoltzfus-Dueck, T., and Scott, B. Thu .
"Momentum flux parasitic to free-energy transfer". United States. https://doi.org/10.1088/1741-4326/aa7289. https://www.osti.gov/servlets/purl/1426203.
@article{osti_1426203,
title = {Momentum flux parasitic to free-energy transfer},
author = {Stoltzfus-Dueck, T. and Scott, B.},
abstractNote = {An often-neglected portion of the radial $\boldsymbol{E}\times \boldsymbol{B}$ drift is shown to drive an outward flux of co-current momentum when free energy is transferred from the electrostatic potential to ion parallel flows. This symmetry breaking is fully nonlinear, not quasilinear, necessitated simply by free-energy balance in parameter regimes for which significant energy is dissipated via ion parallel flows. The resulting rotation peaking is counter-current and has a scaling and order of magnitude that are comparable with experimental observations. Finally, the residual stress becomes inactive when frequencies are much higher than the ion transit frequency, which may explain the observed relation of density peaking and counter-current rotation peaking in the core.},
doi = {10.1088/1741-4326/aa7289},
journal = {Nuclear Fusion},
number = 8,
volume = 57,
place = {United States},
year = {Thu May 11 00:00:00 EDT 2017},
month = {Thu May 11 00:00:00 EDT 2017}
}
Web of Science
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Works referencing / citing this record:
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