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Harmonic Wave and Steady Current Effects on Plane Fishnets

[+] Author Affiliations
Cheslav Balash, Neil Bose, Jonathan Binns

University of Tasmania, Launceston, TAS, Australia

Bruce Colbourne

Memorial University of Newfoundland, St. John’s, NL, Canada

Wayne Raman-Nair

National Research Council, St. John’s, NL, Canada

Paper No. OMAE2010-20279, pp. 167-172; 6 pages
doi:10.1115/OMAE2010-20279
From:
  • ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering
  • 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 4
  • Shanghai, China, June 6–11, 2010
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4912-5 | eISBN: 978-0-7918-3873-0
  • Copyright © 2010 by ASME and Crown in Right of Canada

abstract

Individual and interaction effects of parallel current and waves on three plane nets were empirically examined. A current opposing the direction of the waves was shown to shorten the wavelength while a current in-line with the direction of the waves stretched the wave length. Due to these wave modifications, the combined loads produced by a current and waves were significantly less than the sum of current and wave forces applied individually. Applying a vector approach, the unsteady loads were split into drag forces and inertia components. Both components contributed considerably to the hydrodynamic loads for wave-only cases. For combinations of waves and current, the inertia force was significantly greater than the drag force. Further insights were also provided into the concepts of effective thickness and the modified Keulegan-Carpenter number as parameters quantifying inertia force and drag force for fishnets.

Copyright © 2010 by ASME and Crown in Right of Canada
Topics: Waves

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