Universality of Fast Turbulent Magnetic Reconnection under High Landquist Number

We report simulation results for turbulent magnetic reconnection under high Lundquist number using three-dimensional magnetohydrodynamics model. By exerting

external turbulences with different amplitudes of driver and different Lundquist numbers, it is found that the normalized global reconnection rate can be about 0.02 - 0.1,

with the driver ranging from 0 to moderate value. The rate is nearly independent on Lundquist number, proving that occurs fast turbulent reconnection, during which the

classic X-point inflow/outflow picture is preserved and magnetic flux ropes (plasmoids in 2D) are hierarchically formed and ejected. A stochastic separation of the reconnected magnetic field lines with large opening angles follows a super-diffusion, from which the rate is measured to be nearly the same values as that obtained from the mixing of traced populations.