The turbulent twisted magnetic flux tube gas

Details The turbulent twisted magnetic flux tube gas The turbulent twisted magnetic flux tube gas

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phfl...27..994b&link_type=abstract

Physics of Fluids (ISSN 0031-9171), vol. 27, April 1984, p. 994-1004.

Physics

22

Magnetic Flux, Magnetohydrodynamic Turbulence, Plasma Dynamics, Solar Physics, Asymptotic Methods, Conducting Fluids, Gas Dynamics, Photosphere, Two Dimensional Flow

Scientific paper

The kinematic behavior of a dilute, two-dimensional 'gas' of parallel twisted magnetic flux tubes in a highly conducting fluid is considered. Collisions between flux tubes with the same sense of twist are inelastic due to the reconnection of their oppositely directed azimuthal magnetic field components at impact. In some collisions, the tension in the reconnected magnetic flux is sufficient to bind the two flux tubes together. Collisions between flux tubes with the opposite sense of twist are elastic. It is shown that a tenuous gas of individual twisted flux tubes condenses into two large-scale regions of magnetic field with opposite twists. This calculation illustrates the results of Montgomery and co-workers on the migration of magnetic energy towards small wavenumbers in two-dimensional magnetohydrodynamic (MHD) turbulence. In particular, this problem illustrates the dynamical nonequilibrium of the relaxation phase in turbulent MHD systems.

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