A cascade model for turbulent dissipation in convection-accretion disks

Details A cascade model for turbulent dissipation in convection-accretion disks A cascade model for turbulent dissipation in convection-accretion disks

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...357l..53s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 357, July 10, 1990, p. L53-L56. Research supported by the Max-Pla

Statistics

Computation

3

Accretion Disks, Computational Astrophysics, Convection, Turbulence Effects, Astronomical Models, Dissipation, Stability, Turbulence Models

Scientific paper

A cascade model for driven quasi-steady fluid turbulence is applied to calculation of the dissipation parameter, alpha, for a convection-accretion disk. The mode analysis is nonlocal in the vertical direction and allows arbitrary rotation curves. Nonaxisymmetric modes, nonlinear mode structure, and turbulent cascade dynamics are all treated. It is shown that proper respect of these features leads to a much larger value of alpha than would be the case in their neglect.

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