Nonlinear gyrofluid model of ITG turbulence

Conference · Sun May 01 04:00:00 EDT 1994 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:6692900

Dorland, W; Hammett, G w; Hahm, T S; Beer, M A ^[1]

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1. P. O. Box 451, Princeton, New Jersey 08543, Princeton University Plasma Physics Laboratory (United States)

Early results from nonlinear simulations and analysis based on a recently derived nonlinear gyrofluid model [W. Dorland and G. W. Hammett, Phys. Fluids B, 812 (1993)] of electrostatic ion-temperature-gradient driven turbulence are presented. Comparisons with gyrokinetic particle simulations reveal a few important simulation requirements (such as enforcing radial periodicity), and indicate that the gyrofluid description is probably adequate to describe three-dimensional, low-frequency drift-type turbulence. Results from a detailed weak-turbulence analysis of drift wave turbulence are presented which support this conclusion. The importance of keeping the proper adiabatic electron response is also discussed. In particular, perpendicular velocity shear is greatly enhanced when the magnetic shear is weak if the nonphysical radial transport of electrons is disallowed.

• OSTI ID: 6692900
• Report Number(s): CONF-9301107--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 284:1
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
CLOSED PLASMA DEVICES
DRIFT INSTABILITY
INSTABILITY
ION TEMPERATURE
NONLINEAR PROBLEMS
PLASMA DRIFT
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
PLASMA SIMULATION
SIMULATION
TEMPERATURE GRADIENTS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE