Comparison of fluid forces and wake modes between free vibration and tracking motion of a circular cylinder

J. Zhao, Andras Nemes, D. Lo Jacono, J. Sheridan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

In this study, experimental investigation compares the fluid forces and wake modes of a freely-vibrating circular cylinder and a VIV-trajectory-tracking cylinder. The free VIV response was modelled on a low-friction air bearing system in conjunction with water channel facilities exhibits classical three amplitude-response ("initial", "upper" and "lower") branches. Measurements of the fluid forces, cylinder displacement and the wake modes are simultaneously conducted. On the other hand, the forced vibration experiments were conducted using a realtime PID motion controller with very high accuracy. Compared to the previous work of a cylinder undergoing sinusoidallydriven oscillations, the present study provides a more accurate comparison between free and forced vibrations. The wake modes of the cylinder undergoing tracking motion show some remarkable similarities to the case of free vibration.

Original languageEnglish (US)
Title of host publicationProceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012
EditorsP.A. Brandner, B.W. Pearce
PublisherAustralasian Fluid Mechanics Society
ISBN (Electronic)9780646583730
StatePublished - Jan 1 2012
Event18th Australasian Fluid Mechanics Conference, AFMC 2012 - Launceston, Australia
Duration: Dec 3 2012Dec 7 2012

Publication series

NameProceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012

Other

Other18th Australasian Fluid Mechanics Conference, AFMC 2012
CountryAustralia
CityLaunceston
Period12/3/1212/7/12

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    Zhao, J., Nemes, A., Lo Jacono, D., & Sheridan, J. (2012). Comparison of fluid forces and wake modes between free vibration and tracking motion of a circular cylinder. In P. A. Brandner, & B. W. Pearce (Eds.), Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012 (Proceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012). Australasian Fluid Mechanics Society.