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

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

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4 Citations (Scopus)


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
Title of host publicationProceedings of the 18th Australasian Fluid Mechanics Conference, AFMC 2012
Subtitle of host publicationLaunceston, Australia, 3-7 December 2012
EditorsP.A. Brandner, B.W. Pearce
PublisherAustralasian Fluid Mechanics Society
Number of pages4
ISBN (Electronic)9780646583730
Publication statusPublished - 2012
EventAustralasian Fluid Mechanics Conference 2012 - University of Tasmania (Newnham Campus), Launceston, Australia
Duration: 3 Dec 20127 Dec 2012
Conference number: 18th


ConferenceAustralasian Fluid Mechanics Conference 2012
Abbreviated titleAFMC 2012
OtherThe 18th AFMC is to be the 1st of a series which will be held every 2 years by The Australasian Fluid Mechanics Society.
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