Viscous Transonic Flow around the Inner Edge of Geometrically Thin Accretion Disks

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  • Viscous Transonic Flow around the Inner

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The effect of viscosity on the flow around the inner edge of an accretion disk surrounding a black hole is studied. Geometrically thin disks are assumed and the "alpha viscous law" is adopted. Transonic solutions which satisfy the outer boundary condition of the Keplerian disk as well as the condition of passing thorough a critical point are obtained numerically. It is found that in the case of large viscosity(α>0.05)transonic solutions pass through a nodal-type critical point outside the radius of the marginally stable circular orbit.

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