✦ LIBER ✦

On the maximal value of the turbulent α -parameter in accretion discs

✍ Scribed by P. Abolmasov; N.I. Shakura

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 94 KB
Volume: 330
Category: Article
ISSN: 0004-6337
DOI: 10.1002/asna.200911230

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✦ Synopsis

Abstract

In this short paper we show that making turbulence two‐rather than three‐dimensional may increase the effective turbulent viscosity by about 40 %. Dimensionless hydrodynamical viscosity parameters up to α~max~ = 0.25 M~t~^2^ may be obtained in this approach, which are in better agreement with the observational data on non‐stationary accretion than the values obtained in numerical simulations. However, the α ‐parameter values known from observations are still several times higher (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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