Fluctuation-induced shear flow and energy transfer in plasma interchange turbulence
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Peking Univ., Beijing (China)
- Peking Univ., Beijing (China)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
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.
- Research Organization:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- FC02-08ER54966
- OSTI ID:
- 1469661
- Alternate ID(s):
- OSTI ID: 1226661
- Journal Information:
- Physics of Plasmas, Vol. 22, Issue 11; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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