SPH Simulations of Accretion Disks and Narrow Rings

S.T.Maddison, J.R.Murray & J.J.Monaghan

Abstract

We modelled a two dimensional viscous SPH (Smoothed Particle Hydrodynamics) disk and compared our results with that of the Lynden-Bell & Pringle theory (1974). After several rotations a non-axisymmetric instability developed at the inner disk edge. To investigate further, we reduced the model to a single ring of SPH particles, which is actually inconsistent with SPH as it assumes a smoothed initial state. The stability analysis confirms what the simulations show.

smaddison@swin.edu.au
Back to Publications or Home