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Zonal flow generation and its feedback on turbulence production in drift wave turbulence
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Pushkarev, Andrey V., Bos, Wouter J. T. and Nazarenko, Sergey (2013) Zonal flow generation and its feedback on turbulence production in drift wave turbulence. Physics of Plasmas, Volume 20 (Number 4). Article number 042304. doi:10.1063/1.4802187 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.4802187
Abstract
Plasma turbulence described by the Hasegawa-Wakatani equations is simulated numerically for different models and values of the adiabaticity parameter C . It is found that for low values of C turbulence remains isotropic, zonal flows are not generated and there is no suppression of the meridional drift waves and particle transport. For high values of C , turbulence evolves towards highly anisotropic states with a dominant contribution of the zonal sector to the kinetic energy. This anisotropic flow leads to a decrease of turbulence production in the meridional sector and limits the particle transport across the mean isopycnal surfaces. This behavior allows to consider the Hasegawa-Wakatani equations a minimal PDE model, which contains the drift-wave/zonal-flow feedback loop mechanism.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Mathematics | ||||||||
Journal or Publication Title: | Physics of Plasmas | ||||||||
Publisher: | American Institute of Physics | ||||||||
ISSN: | 1070-664X | ||||||||
Official Date: | 19 April 2013 | ||||||||
Dates: |
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Volume: | Volume 20 | ||||||||
Number: | Number 4 | ||||||||
Article Number: | Article number 042304 | ||||||||
DOI: | 10.1063/1.4802187 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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