Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8282
Title: A numerical study of three-dimensional wave interaction with a square cylinder
Authors: Li, CW 
Lin, P
Keywords: Large eddy simulation (LES)
Numerical model
Square cylinder
Wave forces
Wave-structure interaction
Issue Date: 2001
Source: Ocean engineering, 2001, v. 28, no. 12, p. 1545-1555 How to cite?
Journal: Ocean Engineering 
Abstract: In this study, a three-dimensional numerical model is used to study the wave interaction with a vertical rectangular pile. The model employs the large eddy simulation (LES) method to model the effect of small-scale turbulence. The velocity and vorticity fields around the pile are presented and discussed. The drag and inertial coefficients are calculated based on the numerical computation. The calculated coefficients are found to be in a reasonable range compared with the experimental data. Additional analyses are performed to assess the relative importance of drag and initial effects, which could be quantified by the force-related Keulegan and Carpenter (KC) number: KCf=UT/(4πL). Here U is the maximum fluid particle velocity, T the wave period and L the length of structure aligned with the wave propagation direction. For small KCf, the effective drag coefficient is proportional to 1/KCf, provided the wavelength is much longer than the structural length. When wavelength is comparable to the structure dimension, the effective drag coefficient would be reduced significantly due the cancellation of forces, which has been demonstrated by numerical results.
URI: http://hdl.handle.net/10397/8282
ISSN: 0029-8018
DOI: 10.1016/S0029-8018(01)00011-7
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