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arXiv:astro-ph/0004006 (astro-ph)
[Submitted on 1 Apr 2000]

Title:Numerical Simulations of Convective Accretion Flows in Three Dimensions

Authors:Igor V. Igumenshchev, Marek A. Abramowicz, Ramesh Narayan
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Abstract: Advection-dominated accretion flows (ADAFs) are known to be convectively unstable for low values of the viscosity parameter alpha. Two-dimensional axisymmetric hydrodynamic simulations of such flows reveal a radial density profile which is significantly flatter than the rho~r^{-3/2} expected for a canonical ADAF. The modified density profile is the result of inward transport of angular momentum by axisymmetric convective eddies. We present three-dimensional hydrodynamic simulations of convective ADAFs which are free of the assumption of axisymmetry. We find that the results are qualitatively and quantitatively similar to those obtained with two-dimensional simulations. In particular, the convective eddies are nearly axisymmetric and transport angular momentum inward.
Comments: 12 pages, 5 figures, submitted to ApJ
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0004006
  (or arXiv:astro-ph/0004006v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0004006
Related DOI: https://doi.org/10.1086/312755

Submission history

From: Igor V. Igumenshchev [view email]
[v1] Sat, 1 Apr 2000 17:59:23 UTC (376 KB)
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