The dynamics of intermediate-scale magnetic fields

Details The dynamics of intermediate-scale magnetic fields The dynamics of intermediate-scale magnetic fields

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983maggi.......14v&link_type=abstract

Magnitnaia Gidrodinamika (ISSN 0025-0015), Apr.-June 1983, p. 14-20. In Russian.

Astronomy and Astrophysics

Astrophysics

Astrophysics, Interstellar Magnetic Fields, Magnetoplasmadynamics, Anisotropic Media, Conducting Fluids, Convective Flow, Dynamo Theory, Interstellar Gas, Milky Way Galaxy

Scientific paper

The transport and pumping of magnetic fields in media of high conductivity are examined. Particular emphasis is placed on a layer of single-tier convection (e.g., the convection zone of a star) and on the dynamics of a magnetic field in a plane layer where the cell dimensions are commensurate with the layer thickness (e.g., the dimensions of interstellar clouds in the Galaxy which are of the order of the disk thickness). It is shown that, in the simplest case, incompressible motion causes only a diamagnetic transport of the field to the lower and upper boundaries of the layer. In the presence of density stratification, the motion is no longer incompressible and two-dimensional motion leads to field pumping. Topological pumping is absent in either case, this type of pumping occurring only in a medium of low conductivity.

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