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TECHNICAL BRIEFS

Moderately and Widely Spaced Circular Cylinders in Crossflow and a Universal Wake Number

[+] Author and Article Information
D. Sumner1

Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canadadavid.sumner@usask.ca

A. J. Schenstead

Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada

1

Corresponding author.

J. Fluids Eng 128(5), 1122-1125 (Mar 13, 2006) (4 pages) doi:10.1115/1.2238879 History: Received July 08, 2005; Revised March 13, 2006

The universal wake number concept was examined for the flow around two circular cylinders of equal diameter arranged in moderately and widely spaced staggered configurations. The experiments were conducted in the subcritical Reynolds number regime for PD=1.5–4.0. The results establish new limits for the validity of the universal wake number concept for moderately and widely spaced staggered cylinders in crossflow, and extend the results of an earlier study that focused only on closely spaced staggered cylinders.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 3

Vortex shedding data for widely spaced staggered cylinders: (a)P∕D=3.0; (b)P∕D=4.0. Symbols as in Fig. 2.

Grahic Jump Location
Figure 2

Vortex shedding data for moderately spaced staggered cylinders: (a)P∕D=1.5; (b)P∕D=1.75; (c)P∕D=2.0; (d)P∕D=2.5.∎ or ◻, Re=3.2×104; ● or 엯, Re=5.6×104; ▴ or ▵, Re=7.2×104. Solid symbols: upstream cylinder. Open symbols: downstream cylinder. Dashed line: single cylinder.

Grahic Jump Location
Figure 1

Two staggered circular cylinders in cross flow: (a) nomenclature and (b) location of the hot-wire probe behind each cylinder

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