Gyrokinetic and global fluid simulations of tokamak microturbulence and transport
Results are presented from the first systematic nonlinear kinetic simulation study of the swings and parameter dependences of toroidal ion-temperature-gradient (ITG) turbulence and transport, and from the first such study that includes sheared toroidal flows. Key results include the observation of clear gyroBohm scaling of the turbulent transport and of a surprisingly weak dependence of the transport on toroidal flow shear. Based on the simulation results, a parameterization of the transport is given that includes the dependence on all of the relevant physical parameters. The transition from local to nonlocal transport as a function of the profile scale length has been investigated using two-dimensional global fluid simulations of dissipative drift-wave turbulence. Local gyroBohm scaling is observed, except at very short profile scale lengths.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10103457
- Report Number(s):
- UCRL-JC-117113; CONF-940933-17; ON: DE95003628; TRN: 95:000360
- Resource Relation:
- Conference: 15. international conference on plasma physics and controlled nuclear fusion research,Madrid (Spain),26 Sep - 1 Oct 1994; Other Information: PBD: 30 Aug 1994
- Country of Publication:
- United States
- Language:
- English
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