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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.. (2008) The toroidal momentum diffusivity in a tokamak plasma: A comparison of fluid and kinetic calculations. Physics of Plasmas, Vol.15 (No.4). Article No. 044502. 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 |
|---|---|
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Physics of Plasmas |
| Publisher: | American Institute of Physics |
| ISSN: | 1070-664X |
| Date: | April 2008 |
| Volume: | Vol.15 |
| Number: | No.4 |
| Number of Pages: | 4 |
| Page Range: | Article No. 044502 |
| Identification Number: | 10.1063/1.2907370 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/30147 |
Data sourced from Thomson Reuters' Web of Knowledge
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