Community Research and Development Information Service - CORDIS

Abstract

We present 3-dimensional nonlinear simulations of collisional drift-wave turbulence. Results for the Hasegawa-Wakatani equations (without magnetic shear) are compared to former 2-dimensional simulations. In contrast to the 2-dimensional system, the 3-dimensional situation is completely dominated by a nonlinear drive mechanism. The final state of the system is sensitive to the configuration of the computational grid since the sheared flow develops at the longest scales of the system. When magnetic shear is included, the system is linearly stable but the turbulence self-sustains by basically the same nonlinear mechanism. Magnetic shear limits the size of the dominant eddies, so the system evolves to a stationary turbulent state independent of the computational box. Finally, we show that the level of turbulence in the system with magnetic shear depends sensitively on the size of the effective Larmor radius compared with the characteristic scale length of the eddies.

Additional information

Authors: ZEILER A, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);BISKAMP D, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);DRAKE J F, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPP 6/339 EN (1996) 21pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München (DE)
Record Number: 199610496 / Last updated on: 1996-05-13
Category: PUBLICATION
Original language: en
Available languages: en
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top