1. A fully-vectorized, time-accurate, threedimensional Navier-Stokes solver has been developed to implement the previousscheme. Theprocessing rateobtained on a Cray G9O is approximately 1.1x IO-' CPU sec/grid point/iteration. The code has been validated for both steady and unsteady flow fields 22-25. In particular, Refs. 26-28 describe the application of the algorithm to the case of vortex breakdown at low Reynolds numbers. 2.2 Grid Structureand Boundary Conditions
2. Vortex stability and breakdown - Survey and extension
3. Vortex Breakdown
4. Vortex breakdown: Observations and explanations