Non-linear magnetic diffusivity in mean-field electrodynamics

Details Non-linear magnetic diffusivity in mean-field electrodynamics Non-linear magnetic diffusivity in mean-field electrodynamics

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.316..684u&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 316, Issue 3, pp. 684-688.

Astronomy and Astrophysics

Astronomy

2

Mhd, Turbulence, Stars: Magnetic Fields, Ism: Magnetic Fields

Scientific paper

We consider non-linear transport and drift processes caused by an inhomogeneous magnetic field in a turbulent fluid. The coefficients of magnetic diffusivity and drift velocity are calculated by making use of the second-order correlation approximation. Transport processes in the presence of a sufficiently strong magnetic field become anisotropic with larger diffusion rate and turbulent electrical resistivity across the field than along the field. Non-linear effects also lead to a drift of the magnetic field away from the regions with a higher magnetic energy.

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