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The toroidal momentum diffusivity in a tokamak plasma : a comparison of fluid and kinetic calculations
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Strintzi, D., Peeters, A. G. and Weiland, J. (Jan) (2008) The toroidal momentum diffusivity in a tokamak plasma : a comparison of fluid and kinetic calculations. Physics of Plasmas, Volume 15 (Number 4). Article No. 044502. doi:10.1063/1.2907370 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.2907370
Abstract
Fluid and gyrokinetic calculations of the toroidal momentum diffusivity in a tokamak are compared. The four-moment gyrofluid model predicts the Prandtl number connected with the ion temperature gradient mode reasonably well provided the drift term is kept in the momentum balance. Without the drift term in the momentum balance, some previous gyrofluid models predicted small values of the Prandtl number in the range of experimental observations. It is shown that the drift term enters in the fluid equations through the gyroviscosity. Gyrokinetic calculations of the ion temperature gradient mode with kinetic electrons, and for experimentally relevant parameters yield a Prandtl number in the range 0.7-1.2. (C) 2008 American Institute of Physics.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Tokamaks, Plasma confinement, Plasma dynamics | ||||
Journal or Publication Title: | Physics of Plasmas | ||||
Publisher: | American Institute of Physics | ||||
ISSN: | 1070-664X | ||||
Official Date: | April 2008 | ||||
Dates: |
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Volume: | Volume 15 | ||||
Number: | Number 4 | ||||
Number of Pages: | 4 | ||||
Page Range: | Article No. 044502 | ||||
DOI: | 10.1063/1.2907370 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Euratom, Greece | ||||
Grant number: | ERB 5005 CT 99 0100 |
Data sourced from Thomson Reuters' Web of Knowledge
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