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TECHNICAL PAPERS

Numerical Prediction of Flow Fields Around Circular Cylinders: Forced Motion and Dynamic Response Cases

[+] Author and Article Information
S. Lu, Ö. F. Turan

School of the Built Environment-Mechanical Engineering, Victoria University of Technology, P.O. Box 14428 MC, Melbourne, Victoria 8001, Australia

J. Fluids Eng 122(4), 703-714 (Feb 08, 2000) (12 pages) doi:10.1115/1.1287790 History: Revised February 08, 2000
Copyright © 2000 by ASME
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References

Figures

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Force coefficient histories for fm/fv0=0.50,Re=2000
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Streamline and vorticity contours for fm/fv0=0.50,Re=2000
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Force coefficient histories for fm/fv0=0.33,Re=2000
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Streamline and vorticity contours for fm/fv0=0.33,Re=2000
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Force coefficient histories for ft/fv0=0.36,Re=2000
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Streamline and vorticity contours for ft/fv0=0.36,Re=2000
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Force coefficient histories for ft/fv0=fm/fv0=0.36, in-phase torsional and transverse oscillations, Re=2000
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Streamline and vorticity contours for ft/fv0=fm/fv0=0.36, in-phase torsional and transverse oscillations, Re=2000
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Force coefficient histories for ft/fv0=fm/fv0=0.36, out-of-phase torsional and transverse oscillations, Re=2000
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Streamline and vorticity contours for ft/fv0=fm/fv0=0.36, out-of-phase torsional and transverse oscillations, Re=2000
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Streamline and vorticity contours for fm/fv0=0.83,Re=2000
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Cylinder displacement, force coefficient and separation point histories for fm/fv0=0.83,Re=2000
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Regions of vortex synchronization patterns given by Zdero et al. 4 based on a map given by Williamson and Roshko. The flow visualization results of Zdero et al. are shown by the dashed lines corresponding to A/d=2 and 7. The details of the synchronized wake regions are given in the inset where vortices shed per motion cycle are enclosed by dotted lines (S, single vortex; P, vortex pair; C, coalescence).
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Response amplitudes of a spring-mounted circular cylinder in cross flow. Present results: □, m/2ρa2=1.57,ξy=0;* , m/2ρa2=7.6,ξy=0.; +, m/2ρa2=7.6,ξy=0.051); experimental results (Griffin and Ramberg 21): ▪, m/2ρa2=7.6,ξy=0.051.
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Streamline and vorticity contours for fv0/fn=1.36,m/2ρa2=1.57,ξy=0.,Re=2000
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Relative phase between lift and displacement for fv0/fn=(a) 1.07, (b) 1.22, (c) 1.36, (d) 1.56, (e) 1.71 and (f) 2.14 at m/2ρa2=1.57,ξy=0.,Re=2000
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Relative phase between lift and displacement for fv0/fn=(a) 0.89, (b) 1.11, (c) 1.21, and (d) 1.33 at m/2ρa2=7.6,ξy=0.,Re=2000
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Relative phase between lift and displacement for fv0/fn=(a) 0.89, (b) 1.02, (c) 1.11, (d) 1.21, and (e) 1.33 at m/2ρa2=7.6,ξy=0.051,Re=2000
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Response frequency, f, of a spring-mounted circular cylinder. □, m/2ρa2=1.57,ξy=0;* , m/2ρa2=7.6,ξy=0.; +, m/2ρa2=7.6,ξy=0.051.

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