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Technical Briefs

Numerical Simulation of Two-Degree-of-Freedom Vortex-Induced Vibration of a Circular Cylinder Between Two Lateral Plane Walls in Steady Currents

[+] Author and Article Information
Ming Zhao1

 School of Computing, Engineering and Mathematics, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australiam.zhao@uws.edu.au

Feifei Tong, Liang Cheng

 School of Civil and Resource Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia

1

Corresponding author.

J. Fluids Eng 134(10), 104501 (Sep 28, 2012) (5 pages) doi:10.1115/1.4007426 History: Received October 05, 2011; Revised August 13, 2012; Published September 24, 2012; Online September 28, 2012

Vortex-induced vibration (VIV) of a circular cylinder at a low mass ratio of 1.5 between two lateral walls is investigated numerically. The focus of the study is to examine the effects of the two lateral walls on the VIV. Numerical simulations are carried out for w/D = 4, 6, 10, and 20 with D and w being the cylinder diameter and the distance between the two walls, respectively. It is found that the effects of the two walls on the VIV are obvious as w/D ≤ 6 and negligibly small as w/D = 10. The VIV amplitudes in both x- and y-directions increase with the increasing w/D in the lock-in regime.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Sketch for VIV of a circular cylinder confined in a channel

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Figure 2

Variation of VIV amplitudes with reduced velocity: (a) inline amplitude and (b) crossflow amplitude

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Figure 3

Variation of VIV frequency with reduced velocity: (a) inline frequency and (b) crossflow frequency

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Figure 4

XY-trajectories for w/D = 10

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Figure 5

XY-trajectories for w/D = 4

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Figure 6

Vorticity contours for w/D = 10 and Vr  = 5

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Figure 7

Vorticity contours for w/D = 6 and Vr  = 4.5

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Figure 8

Vorticity contours for w/D = 4 and Vr  = 4

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