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TECHNICAL BRIEFS

Comment on the Loss of Vorticity in the Near Wake of Bluff Bodies

[+] Author and Article Information
M. M. Zdravkovich

Aero Mech. Engrg. Dept., University of Salford, Salford, U.K.

J. Fluids Eng 111(1), 104-105 (Mar 01, 1989) (2 pages) doi:10.1115/1.3243596 History: Received December 22, 1987; Online October 26, 2009

Abstract

Fage and his co-workers [1,2] made a remarkable discovery in the 20’s that only half of the vorticity generated by bluff bodies remained concentrated in shed vortices. This belated comment reconsiders Fage’s method of “loss” calculation by examining nonlinear effects. The ignored effect of three dimensional distortion of vortex filaments before roll up might be another important cause for the “apparent” loss of vorticity.

Copyright © 1989 by ASME
Topics: Wakes , Vorticity , Vortices
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