Nonlinear gyrofluid model of ITG turbulence

Conference · Sun May 01 00:00:00 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-; CODEN: APCPCS
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 284:1; Conference: U.S./Japan workshop on ion temperature gradient driven turbulent transport, Austin, TX (United States), 11-14 Jan 1993; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TOKAMAK DEVICES
TURBULENCE
DRIFT INSTABILITY
ION TEMPERATURE
NONLINEAR PROBLEMS
PLASMA DRIFT
PLASMA SIMULATION
TEMPERATURE GRADIENTS
CLOSED PLASMA DEVICES
INSTABILITY
PLASMA INSTABILITY
PLASMA MICROINSTABILITIES
SIMULATION
THERMONUCLEAR DEVICES
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