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A self-consistent model for turbulent magnetic reconnection

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Turbulent magnetic reconnection is investigated with the aid of a self-consistent turbulence model. In this framework, turbulence is not injected externally but is generated by the mean-field inhomogeneities. Dynamics of the mean-field and turbulence are treated simultaneously. It is shown that turbulence contributes to the fast reconnection only if the dynamic balance between the transport enhancement and suppression both due to turbulence works. The turbulent cross helicity (velocity–magnetic-field correlation) plays an essential role in the realization of fast reconnection through confining the enhanced magnetic diffusivity to a narrow region.

Author(s):

Nobumitsu Yokoi    
Institute of Industrial Science, University of Tokyo
Japan

Katsuaki Higashimori    
Department of Earth Planetary Science, University of Tokyo
Japan

Masahiro Hoshino    
Department of Earth Planetary Science, University of Tokyo
Japan