Generation of large-scale vortices in compressible helical turbulence

Details Generation of large-scale vortices in compressible helical turbulence Generation of large-scale vortices in compressible helical turbulence

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989plap....1..363c&link_type=abstract

In ESA, Proceedings of an International School and Workshop on Plasma Astrophysics, Volume 1 p 363-369 (SEE N89-24910 18-75)

Astronomy and Astrophysics

Astrophysics

3

Dynamo Theory, Hydrodynamic Equations, Plasma Turbulence, Spiral Galaxies, Vortex Generators, Broken Symmetry, Density Wave Model, Flow Equations, Interstellar Magnetic Fields

Scientific paper

Generation of large-scale vortices in a compressible self-gravitating turbulent medium is considered. The closed equation describing evolution of the large-scale vortices in helical turbulence with finite correlation time is obtained. This equation has a form similar to the hydromagnetic dynamo equation, which allows the vortex generation effect to be called the vortex dynamo. It is possible that principally the same mechanism is responsible both for amplification and maintenance of density waves and magnetic fields in gaseous disks of spiral galaxies.

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