The shear-layer instability of a circular cylinder wake

Mark C. Thompson, Kerry Hourigan
2005 Physics of Fluids  
A reinterpretation is made of previously published data concerning the frequency of the instability waves in the separated shear layer from a circular cylinder for Reynolds numbers in the range 10 3 -10 5 . An accurate fit to the observed variation can be achieved using a piecewise fit based on theoretical and empirical arguments. A logical conclusion is that the ratio of the frequency of the instability waves to the Kármán vortex shedding frequency is indeed determined by the boundary-layer properties at separation, as suggested by Bloor.
doi:10.1063/1.1852581 fatcat:3sx4axuih5fhnebdnz2ffcyeri