Magnetic flux tube tunneling

Details Magnetic flux tube tunneling Magnetic flux tube tunneling

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phrve..56.2094d&link_type=abstract

Physical Review E (Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics), Volume 56, Issue 2, August 1997,

Physics

22

General Theory And Basic Studies Of Plasma Lifetime, Particle And Heat Loss, Energy Balance, Field Structure, Etc., Magnetohydrodynamic And Fluid Equation, Magnetohydrodynamics And Plasmas

Scientific paper

We present numerical simulations of the collision and subsequent interaction of orthogonal magnetic flux tubes. The simulations were carried out using a parallelized spectral algorithm for compressible magnetohydrodynamics. It is found that, under a wide range of conditions, the flux tubes can ``tunnel'' through each other, a behavior not previously seen in studies of either vortex tube or magnetic flux tube interactions. Two conditions must be satisfied for tunneling to occur: the magnetic field must be highly twisted with a field line pitch >>1, and the Lundquist number must be somewhat large, >=2880. An examination of magnetic field lines suggests that tunneling is due to a double-reconnection mechanism. Initially orthogonal field lines reconnect at two specific locations, exchange interacting sections, and ``pass'' through each other. The implications of these results for solar and space plasmas are discussed.

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