Extending the collisional fluid equations into the long mean-free-path regime in toroidal plasmas. I. Plasma viscosity
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (USA)
An expression for the pressure anisotropy and thus for the viscous stress in the plateau regime is derived for arbitrary toroidal magnetic configurations without assuming incompressibility or the existence of flux surfaces, without neglecting the flow components perpendicular to the magnetic surface, and without restricting the flow velocity to be a constant on the flux surface. It can be employed to study low-frequency instabilities in the long mean-free-path regime. A smoothly connected formula for the pressure anisotropy, valid in both the collisional fluid regime and the plateau regime, is given to facilitate the numerical computation. An alternative interpretation of the neoclassical transport theory is also obtained. It is found that if the effects of the temperature gradient are neglected, neoclassical transport fluxes can be interpreted as driven by the velocity stress.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7036532
- Journal Information:
- Physics of Fluids B; (USA), Vol. 2:6, Issue 6; ISSN 0899-8221
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COLLISIONAL PLASMA
VISCOSITY
HEAT FLOW
KINETIC EQUATIONS
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC SURFACES
MAGNETOHYDRODYNAMICS
MEAN FREE PATH
NUMERICAL SOLUTION
PLASMA EXPANSION
PLASMA PRESSURE
PLATEAU REGIME
ROTATING PLASMA
STRESSES
TEMPERATURE GRADIENTS
TENSORS
TOROIDAL CONFIGURATION
VELOCITY
ANNULAR SPACE
CLOSED CONFIGURATIONS
CONFIGURATION
EQUATIONS
EXPANSION
FLUID MECHANICS
HYDRODYNAMICS
MECHANICS
PLASMA
SPACE
700103* - Fusion Energy- Plasma Research- Kinetics