Vortex shedding at high angle of attack. Dye in water.
Reference: S. C. Luo, T. T. Lim, K. B. Lua and H. T. Chia, E. K. R. Goh and Q. W. Ho (1998). The effects of an elliptical tip on the flowfield around an axi-symmetric body at high angle of attack. AIAA JOURNAL, Vol 36, no:10.
Visit T. T. Lim's web site at http://serve.me.nus.edu.sg/limtt/.
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