Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-09
Astrophys.J.627:368-375,2005
Astronomy and Astrophysics
Astrophysics
17 pages, AASTeX
Scientific paper
10.1086/430197
The role of turbulence in a spherically symmetric accreting system has been studied on very large spatial scales of the system. This is also a highly subsonic flow region and here the accreting fluid has been treated as nearly incompressible. It has been shown here that the coupling of the mean flow and the turbulent fluctuations, gives rise to a scaling relation for an effective "turbulent viscosity". This in turn leads to a dynamic scaling for sound propagation in the accretion process. As a consequence of this scaling, the sonic horizon of the transonic inflow solution is shifted inwards, in comparison with the inviscid flow.
Bhattacharjee Jayant K.
Ray Arnab K.
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