Experimental study on flow structures of a screen cylinder wake using PIV

Chenlin Sun, Azlin Mohd Azmi, Tongming Zhou

Research output: Chapter in Book/Conference paperConference paperpeer-review


Suppression of Vortex-induced Vibration (VIV) holds the key to numerous engineering structures as it can result in high amplitude vibrations of a structure, causing fatigue and eventual failure. Experimental results in a wind tunnel on VIV suppression using a screen shroud of 58% porosity showed that the mesh is effective in VIV suppression by 86%. To further explore the mechanism of VIV reduction using a screen shroud, the flow structure in the near wake around a permeable screen cylinder is investigated using Particle Image Velocimetry (PIV). The tests were conducted at a Reynolds number of about 3200 in a water flume. The screen cylinder was made of a stainless-steel wire mesh rolled into a cylinder shape with 58% porosity. The results are compared with that of a bare cylinder in order to evaluate the effectiveness of a screen cylinder on wake modification in the near wake region. The results illustrated that a 58% porosity cylinder could extend the vortex formation length significantly and effectively reduce vortex intensity by more than 57%. These findings are helpful to explain why a screen cylinder used as a shroud is effective in suppressing VIV. © 2018 Australasian Fluid Mechanics Society. All rights reserved.
Original languageEnglish
Title of host publicationProceedings of the 21st Australasian Fluid Mechanics Conference
EditorsTimothy C.W. Lau, Richard M. Kelso
PublisherAustralasian Fluid Mechanics Society
Number of pages4
ISBN (Electronic)978-0-646-59784-3
Publication statusPublished - 2018
Event21st Australasian Fluid Mechanics Conference - Adelaide Convention Centre, Adelaide, Australia
Duration: 10 Dec 201813 Dec 2018
Conference number: 21


Conference21st Australasian Fluid Mechanics Conference
Abbreviated titleAFMC 2018
Internet address


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