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.work..363c&link_type=abstract

Joint Varenna-Abastumani International School and Workshop on Plasma Astrophysics, p. 363 - 369

Astronomy and Astrophysics

Astrophysics

Dynamo Theory: Density Waves, Spiral Galaxies: Density Waves, Spiral Galaxies: Hydrodynamics

Scientific paper

The authors consider the generation of large-scale vortices in a compressible self-gravitating turbulent medium. The closed equation describing the evolution of the large-scale vortices in helical turbulence with finite correlation time is obtained. This equation has the form similar to the hydromagnetic dynamo equation, which allows to call the vortex generation effect 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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