Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence
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Fluctuation-induced shear.pdf
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Author(s)
Sun, C. K.
Wang, X. Y.
Zhou, A.
Wang, X. G.
Li, Bo
Ernst, Darin R
Date Issued
November 2015
Journal
Physics of Plasmas
Publisher
American Institute of Physics (AIP)
Citation
Li, B. et al. “Fluctuation-Induced Shear Flow and Energy Transfer in Plasma Interchange Turbulence.” Physics of Plasmas 22, 11 (November 2015): 112304 © 2015 AIP Publishing LLC
Version
Author's final manuscript
Abstract
Fluctuation-induced E × B shear flow and energy transfer for plasma interchange turbulence are examined in a flux-driven system with both closed and open magnetic field lines. The nonlinear evolution of interchange turbulence shows the presence of two confinement regimes characterized by low and high E × B flow shear. In the first regime, the large-scale turbulent convection is dominant and the mean E × B shear flow is at a relatively low level. By increasing the heat flux above a certain threshold, the increased turbulent intensity gives rise to the transfer of energy from fluctuations to mean E × B flows. As a result, a transition to the second regime occurs, in which a strong mean E × B shear flow is generated.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4935912
