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“Turbulence in low-β reconnection”

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Presentation on theme: "“Turbulence in low-β reconnection”"— Presentation transcript:

1 “Turbulence in low-β reconnection”
by Ferraro & Rogers 2004, Physics of Plasmas, 11, (DOI: / ) S.Tanuma

2 Abstract 2D 2fluid simulations with finite electron inertia
Turbulence occurs when β is small by secondary instability, which are excited by large gradients in guide-field (see Mathaeous for turbulent reconnection). This turbulence does not affect the reconnection rate (altough the group of Cho, Lazarian, & Vishinac conclude reconnection rate is enhanced by turbulence.).

3 Model Collisionless, 2D 2-fluid model X-y plane
Bx=Bxo tanh***: bipolar current Bz=3Bxo 512 x 256 grid Mass ratio Mi/Me=100

4 Stabilizing factors Large guide field (Bz>10Bxo)
Higher temperature (β>0.2) The omission of ion dynamics

5 Simulations Kelvin-helmholtz instability (see Arzner & Scholer for hybrid simulation of Kelvin-Helmholtz instability coupled with fire hose instability)

6 Central Region

7 Growth rate Reconnection rate does not depend on the turbulence.


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