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Induced Separation and Vorticity Using Roughness in VIV of Circular Cylinders at 8×103 < Re < 2.0×105

[+] Author Affiliations
Michael M. Bernitsas, Kamaldev Raghavan, G. Duchene

University of Michigan, Ann Arbor, MI

Paper No. OMAE2008-58023, pp. 993-999; 7 pages
doi:10.1115/OMAE2008-58023
From:
  • ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
  • Volume 5: Materials Technology; CFD and VIV
  • Estoril, Portugal, June 15–20, 2008
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4822-7 | eISBN: 0-7918-3821-8
  • Copyright © 2008 by ASME

abstract

Results of an experimental investigation on fluid flow past an elastically mounted circular cylinder with rectangular surface roughness strips are presented. Flow characteristics change depending on the strip width, roughness grit size, and location. Roughness size and distribution can be designed to enhance or reduce/suppress VIV amplitude and increase or reduce the range of synchronization, respectively. To the authors’ knowledge this is the first study in passive control of VIV using properly distributed roughness.

Copyright © 2008 by ASME

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