Reevaluation of the Braginskii viscous force for toroidal plasma
Abstract
The model by Braginskii for the viscous stress tensor is used to determine the shear and gyroviscous forces acting within a toroidally confined plasma. Comparison is made to a previous evaluation which contains an inconsistent treatment of the radial derivative and neglects the effect of the pitch angle. Parallel viscosity contributes a radial shear viscous force which may develop for sufficient vertical asymmetry to the ion velocity profile. An evaluation is performed of this radial viscous force for a tokamak near equilibrium which indicates qualitative agreement between theory and measurement for impure plasma discharges with strong toroidal flow.
- Publication:
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arXiv e-prints
- Pub Date:
- May 2009
- DOI:
- 10.48550/arXiv.0905.0086
- arXiv:
- arXiv:0905.0086
- Bibcode:
- 2009arXiv0905.0086J
- Keywords:
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- Physics - Plasma Physics;
- Physics - Classical Physics
- E-Print:
- 14 pages, 7 figures, minor revision, final version