Consequences of rotation in energetics of accretion disks

Details Consequences of rotation in energetics of accretion disks Consequences of rotation in energetics of accretion disks

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263..387d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 387-400.

Statistics

Computation

41

Accretion Disks, Computational Astrophysics, Rotation, Turbulence Effects, Astronomical Models, Energy Dissipation, Hydrodynamic Equations, Interstellar Magnetic Fields, Shock Waves, Viscosity

Scientific paper

The influence of rotation on turbulent energy dissipation and its consequences for the energetics of accretion disks are clarified. It is argued that the concept of turbulent viscosity should be revisited to take into account the possibility of nonlocal transport by large scale wave-dominated turbulence. An 'energetic puzzle' resulting from a possible inverse cascade of energy is demonstrated, and various solutions to it are suggested. New prescriptions for turbulent dissipation in the presence of rotation or large-scale waves are given. Emphasis is placed on compressibility effects, for which a detailed analysis of dissipation processes is provided. When the turbulence is strongly influenced by the rotation, most of the energy is transported by sonic waves. The corresponding turbulent viscosity is computed for several kinds of disks.

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