Imperial College London
Portrait Picture

Professor Peter Bearman

Faculty of Engineering, Department of Aeronautics

Emeritus Professor in Aeronautics
 
 
 
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Contact

 

+44 (0)7936 449 701p.bearman Website

 
 
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Location

 

317ACity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Assi:2018:10.1016/j.jfluidstructs.2018.02.007,
author = {Assi, G and Bearman, PW},
doi = {10.1016/j.jfluidstructs.2018.02.007},
journal = {Journal of Fluids and Structures},
pages = {1--21},
title = {Vortex-induced vibration of a wavy elliptic cylinder},
url = {http://dx.doi.org/10.1016/j.jfluidstructs.2018.02.007},
volume = {80},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This paper shows that three-dimensional separation lines on a wavy cylinder may be correlated by the lateral movement of the body responding to flow-induced excitations. Vortex-induced vibration (VIV) of a wavy elliptic cylinder is investigated by mean of experiments in a water channel in the range of Reynold number between 1,500 to 15,000. Results are compared with those for a plain circular cylinder of equivalent diameter with a combined mass–damping parameter of 0.018. Curves of displacement and frequency of vibration showed that the hydroelastic mechanism that drives the wavy cylinder into VIV is not different from that of a plain cylinder. Detailed decomposition of the fluid forces supports this conclusion. The reason for such similar behaviour is the correlation of the sinuous separation lines as the wavy cylinder starts to oscillate. Flow visualization reveals that the three-dimensional surface of the wavy cylinder affects the formation of vortices in the near wake, generating streamwise and cross-flow vorticity associated with the wavelength of the surface. However, once the cylinder is free to respond to VIV, moving in the cross-flow direction, coherent vortex filaments once more dominate the near wake.
AU  - Assi,G
AU  - Bearman,PW
DO  - 10.1016/j.jfluidstructs.2018.02.007
EP  - 21
PY  - 2018///
SN  - 0889-9746
SP  - 1
TI  - Vortex-induced vibration of a wavy elliptic cylinder
T2  - Journal of Fluids and Structures
UR  - http://dx.doi.org/10.1016/j.jfluidstructs.2018.02.007
UR  - https://www.sciencedirect.com/science/article/pii/S0889974617306382
UR  - http://hdl.handle.net/10044/1/57477
VL  - 80
ER  -
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