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

Li, B.; Sun, C. K.; Wang, X. Y.; Zhou, A.; Wang, X. G.; Ernst, D. R.

doi:10.7910/DVN/ERKEQE

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

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.

Authors:: Li, B.; Sun, C. K.; Wang, X. Y.; Zhou, A.; Wang, X. G.; Ernst, D. R.

Publication Date:: 2018-09-25

DOE Contract Number:: FC02-08ER54966

Research Org.:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

OSTI Identifier:: 1878738

DOI:: https://doi.org/10.7910/DVN/ERKEQE

Citation Formats


                    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., 2018. 
        Web.  doi:10.7910/DVN/ERKEQE.

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                    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:https://doi.org/10.7910/DVN/ERKEQE

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                    Li, B., Sun, C. K., Wang, X. Y., Zhou, A., Wang, X. G., and Ernst, D. R. 2018.  
"Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence".  United States.  doi:https://doi.org/10.7910/DVN/ERKEQE.  https://www.osti.gov/servlets/purl/1878738. Pub date:Tue Sep 25 00:00:00 EDT 2018

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@article{osti_1878738,

  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          = {10.7910/DVN/ERKEQE},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {9}

}

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DOI: https://doi.org/10.7910/DVN/ERKEQE

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