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The life-cycle of drift-wave turbulence driven by small scale instability
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Connaughton, Colm, Nazarenko, Sergey and Quinn, Brenda E. (2010) The life-cycle of drift-wave turbulence driven by small scale instability. UNSPECIFIED. -: -. (ArXiv pre-print). (Unpublished)
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Abstract
We demonstrate theoretically and numerically the zonal-flow/drift-wave feedback mechanism for the LH transition in an idealised model of plasma turbulence driven by a small scale instability. Zonal flows are generated by a secondary modulational instability of the modes which are directly driven by the primary instability. The zonal flows then suppress the small scales thereby arresting the energy injection into the system, a process which can be described using nonlocal wave turbulence theory. Finally, the arrest of the energy input results in saturation of the zonal flows at a level which can be estimated from the theory and the system reaches stationarity without damping of the large scales.
| Item Type: | Working or Discussion Paper (UNSPECIFIED) |
|---|---|
| Subjects: | Q Science > QA Mathematics Q Science > QC Physics |
| Divisions: | Faculty of Science > Centre for Complexity Science Faculty of Science > Mathematics |
| Library of Congress Subject Headings (LCSH): | Plasma instabilities, Plasma turbulence, Waves -- Mathematical models, Nuclear fusion |
| Series Name: | ArXiv pre-print |
| Publisher: | - |
| Place of Publication: | - |
| Date: | December 2010 |
| Status: | Peer Reviewed |
| Publication Status: | Unpublished |
| Access rights to Published version: | Restricted or Subscription Access |
| Related URLs: | |
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| URI: | http://wrap.warwick.ac.uk/id/eprint/44650 |
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