Nonlinear instability mechanism in 3-D collisional driftwave turbulence
This paper reports on a numerical simulation of 3-D collisional drift wave turbulence. The linear instability saturates due to energy transfer to small K(2) leading to the formation of convective cells. The system tends to relax to a nonturbulent poloidal shear flow. Introducing a damping of this flow gives rise to an intermittent behaviour, where laminar periods of zero flux alternate with bursts of turbulence and large flux. The transitions occur on a time-scale shorter than linear growth times.
Bibliographic Reference: Report: IPP 6/322 EN (1994) 20 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 199411500 / Last updated on: 1994-12-06
Original language: en
Available languages: en