1. Department of Aerospace Engineering, The University of Michigan, Ann Arbor, MI 48109, USA ()
2. Computational Dynamics Ltd, 200 Shepherd's Bush Road, London W6 7NY, UK
3. Laboratory for Computational Physics and Fluid Dynamics, Naval Research Laboratory, Code 6404, Washington, DC 20375, USA ()
4. Aeronautical and Maritime Research Laboratory, DSTO, PO Box 4331, Victoria 3001, Australia