Journal
EPL
Volume 96, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1209/0295-5075/96/25001
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Funding
- Engineering and Physical Sciences Research Council [EP/H051295/1]
- EPSRC [EP/F029306/1, EP/H051295/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H051295/1, EP/F029306/1] Funding Source: researchfish
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We demonstrate theoretically and numerically the zonal-flow/drift-wave feedback mechanism in an idealised 2-dimensional 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 (in scale) 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 large-scale dissipation. Copyright (C) EPLA, 2011
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