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Three-dimensional Vortex Structures in Bluff-body Wakes

出版	CSIRO. Division of Building, Construction and Engineering, 1995
URL	http://books.google.com.hk/books?id=6JrZZwEACAAJ&hl=&source=gbs_api

註釋

The primary objective of this study was the characterization of the three-dimensional longitudinal vortices found in the wake of a circular cylinder. Using Particle Image Velocimetry (PIV) full instantaneous velocity fields were obtained in the transverse plane containing the cylinder. Footprints of the longitudinal vortices were identified, showing up as counter-rotating pairs. It appears that these vortices are embedded between, and locked to, the Karman vortices. From measured peak vorticity fields, it is clear that the longitudinal vortices are being stretched by the Karman vortices.