The Rise and Fall of α-Model Viscosity

摘要: For nearly two decades, our only useful model for the viscosity in accretion disks has been so-called ‘α-model’. However, it become clear that simplest models — which α is constant are inadequate to explain range of behaviours seen real disks. We show properties steady-state, vertically-averaged can be determined without any assumptions other than obey classical Navier-Stokes equation. These solutions have derived values vary with radius by many orders magnitude even small CV