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Title: Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence

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.
Authors:
 [1] ;  [2] ; ORCiD logo [2] ;  [2] ;  [2] ;  [3]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Peking Univ., Beijing (China)
  2. Peking Univ., Beijing (China)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Publication Date:
Grant/Contract Number:
FC02-08ER54966
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 11; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1469661
Alternate Identifier(s):
OSTI ID: 1226661

Li, B., Sun, C. K., Wang, X. Y., Zhou, A., Wang, X. G., and Ernst, D. R.. Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence. United States: N. p., Web. doi:10.1063/1.4935912.
Li, B., Sun, C. K., Wang, X. Y., Zhou, A., Wang, X. G., & Ernst, D. R.. Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence. United States. doi:10.1063/1.4935912.
Li, B., Sun, C. K., Wang, X. Y., Zhou, A., Wang, X. G., and Ernst, D. R.. 2015. "Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence". United States. doi:10.1063/1.4935912. https://www.osti.gov/servlets/purl/1469661.
@article{osti_1469661,
title = {Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence},
author = {Li, B. and Sun, C. K. and Wang, X. Y. and Zhou, A. and Wang, X. G. and Ernst, D. R.},
abstractNote = {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.},
doi = {10.1063/1.4935912},
journal = {Physics of Plasmas},
number = 11,
volume = 22,
place = {United States},
year = {2015},
month = {11}
}