Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31759
Title: Phase lag between vortex shedding from two tandem bluff bodies
Authors: Alam, MM
Zhou, Y
Keywords: Critical spacing
Phase lag
Strouhal number
Tandem bluff bodies
Issue Date: 2007
Publisher: Academic Press
Source: Journal of fluids and structures, 2007, v. 23, no. 2, p. 339-347 How to cite?
Journal: Journal of fluids and structures 
Abstract: This paper presents a work on the phase lag (φ) between vortex sheddings from two tandem cylinders of various shapes and its influence on fluctuating lift on the upstream cylinder. A differential equation of φ, dφ=[4πfs/(2Vc-dVc)] dx, is derived, where fs is the vortex shedding frequency, Vc is the convective velocity of vortices, and x is the downstream distance from the upstream cylinder. Applying the condition φ=2π at L* = Lc *, as obtained from experimental data, the equation yields φ=2.44π St(L* - Lc *)+2π, where St is the Strouhal number, L* is the normalized cylinder center-to-center spacing and Lc * is the critical spacing defined as the minimum L* at which the upstream cylinder could shed vortices in the gap between the cylinders. This relationship agrees well with experimental data previously reported as well as presently measured.
URI: http://hdl.handle.net/10397/31759
ISSN: 0889-9746
EISSN: 1095-8622
DOI: 10.1016/j.jfluidstructs.2006.11.003
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