Toroidal turbulence simulations with gyro-Landau fluid models in a nonlinear ballooning mode representation
- General Atomics, P. O. Box 85608, San Diego, California 92138-5608 (United States)
- NERSC at Lawrence Livermore National Laboratory, Livermore California (United States)
The method of Hammett and Perkins [Phys. Rev. Lett. [bold 64], 3019 (1990)] to model Landau damping has been recently applied to the moments of the gyro-kinetic equation with curvature drift by Waltz, Dominguez, and Hammett [Phys. Fluids B [bold 4], 3138 (1992)]. The higher moments are truncated in terms of the lower moments (density, parallel velocity, and parallel and perpendicular pressure) by modeling the deviation from a perturbed Maxwellian to fit the kinetic response function at all values of the kinetic parameters: [ital k][sub [parallel]][ital v][sub [ital th]]/[omega], [ital b]=([ital k][sub [perpendicular]][rho])[sup 2]/2, and [omega][sub [ital D]]/[omega]. Here the resulting gyro-Landau fluid equations are applied to the simulation of ion temperature gradient (ITG) mode turbulence in toroidal geometry using a novel 3D nonlinear ballooning mode representation. The representation is a Fourier transform of the Cowley [ital et] [ital al]. [Phys. Fluids B [bold 3], 2767 (1991)] field line following twisted eddy basis ([ital k][sub [ital x][prime]],[ital k][sub [ital y][prime]],[ital z][prime]) with periodicity in toroidal and poloidal angles. Particular emphasis is given to the role of nonlinearly generated [ital n]=0 ([ital k][sub [ital y][prime]]=0, [ital k][sub [ital x][prime]][ne]0) radial modes'' in stabilizing the transport from the finite-[ital n] ITG ballooning modes.
- DOE Contract Number:
- FG03-92ER54150; W-7405-ENG-48
- OSTI ID:
- 7032416
- 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
Similar Records
Fluid models of phase mixing, Landau damping, and nonlinear gyrokinetic dynamics
Gyrofluid turbulence models with kinetic effects
Related Subjects
TOKAMAK DEVICES
TURBULENCE
BALLOONING INSTABILITY
ION TEMPERATURE
NONLINEAR PROBLEMS
PLASMA SIMULATION
TEMPERATURE GRADIENTS
THREE-DIMENSIONAL CALCULATIONS
CLOSED PLASMA DEVICES
INSTABILITY
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
SIMULATION
THERMONUCLEAR DEVICES
700340* - Plasma Waves
Oscillations
& Instabilities- (1992-)