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TECHNICAL BRIEFS

Inadequacy of a Conventional Keulegan-Carpenter Number for Wave and Current Combination

[+] Author and Article Information
M. M. Zdravkovich

Telford Institute, University of Salford, Salford M5 4WT, England

J. Offshore Mech. Arct. Eng 118(4), 309-311 (Nov 01, 1996) (3 pages) doi:10.1115/1.2833922 History: Received February 01, 1996; Revised August 01, 1996; Online January 25, 2008

Abstract

The physical consideration, taken as a starting point, has been based on the change of duration of each wave half-cycle by the superposition of a current. The Keulegan-Carpenter number could reflect that feature if the wave plus current velocity replaces the wave velocity as the reference velocity. It is also argued that the ratio of current to wave velocity is a more appropriate parameter than the reduced velocity. The modified Keulegan-Carpenter numbers separate different observed flow regimes in a coherent manner in drag coefficient and current-to-wave velocity plane.

Copyright © 1996 by The American Society of Mechanical Engineers
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