In this paper we present a computational study of the forces acting on a circular cylinder vibrating both transversely and in-line to a uniform stream. The in-line vibration frequency is equal to twice the transverse frequency. The cylinder thus follows a figure-eight trajectory, emulating the trajectory of a free vortex-induced vibration. We consider three values of transverse oscillation frequency, in the regime of the natural frequency of the Ka´rma´n street, for a Reynolds number of 400. We find that the fluid forces are greatly influenced by the direction in which the figure-eight is traversed. We also find that the spectrum of the lift force is characterized by the strong presence of odd-numbered higher harmonics. Moreover, depending on the combination of oscillation amplitude and frequency, the lift force exhibits aperiodic time dependence.
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ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
August 1–5, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5451-8
PROCEEDINGS PAPER
The Effect of In-Line Oscillation on the Forces of a Cylinder Vibrating in a Steady Flow Available to Purchase
Sofia Peppa,
Sofia Peppa
National Technical University of Athens, Athens, Greece
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Lambros Kaiktsis,
Lambros Kaiktsis
National Technical University of Athens, Athens, Greece
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George Triantafyllou
George Triantafyllou
National Technical University of Athens, Athens, Greece
Search for other works by this author on:
Sofia Peppa
National Technical University of Athens, Athens, Greece
Lambros Kaiktsis
National Technical University of Athens, Athens, Greece
George Triantafyllou
National Technical University of Athens, Athens, Greece
Paper No:
FEDSM-ICNMM2010-30054, pp. 21-28; 8 pages
Published Online:
March 1, 2011
Citation
Peppa, S, Kaiktsis, L, & Triantafyllou, G. "The Effect of In-Line Oscillation on the Forces of a Cylinder Vibrating in a Steady Flow." Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2010 7th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, and Flow-Induced Vibration and Noise: Volume 3, Parts A and B. Montreal, Quebec, Canada. August 1–5, 2010. pp. 21-28. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-30054
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