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http://dx.doi.org/10.9765/KSCOE.2018.30.6.270

Numerical Simulation of Interaction between Composite Breakwater and Seabed under Regular Wave Action by olaFlow Model  

Bae, Ju-Hyun (Dept. of Civil and Environmental Eng., Graduate School, Korea Maritime and Ocean University)
Lee, Kwang-Ho (Dept. of Energy and Plant Eng., Catholic Kwandong University)
Jung, Uk Jin (Dept. of Civil and Environmental Eng., Graduate School, Korea Maritime and Ocean University)
Kim, Do-Sam (Dept. of Civil Eng., Korea Maritime and Ocean Univ.)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.30, no.6, 2018 , pp. 270-285 More about this Journal
Abstract
The behavior of wave-induced pore water pressure inside the rubble mound and seabed, and the resultant structure failure are investigated, which are used in design of the composite breakwater representing the coastal and harbor structures. Numerical simulation techniques have been widely used to assess these behaviors through linear and nonlinear methods in many researches. While the combination of strongly nonlinear analytical method and turbulence model have not been applied yet, which can simulate these characteristics more accurately. In this study, olaFlow model considering the wave-breaking and turbulent phenomena is applied through VOF and LES methods, which gives more exact solution by using the multiphase flow analytical method. The verification of olaFlow model is demonstrated by comparing the experimental and numerical results for the interactions of regular waves-seabed and regular waves-composite breakwater-seabed. The characteristics of the spatial distributions of horizontal wave pressure, excess-pore-water pressure, mean flow velocity and mean vorticity on the upright caisson, and inside the rubble mound and seabed are discussed, as well as the relation between the mean distribution of vorticity size and mean turbulent kinetic energy. And the stability of composite breakwater are also discussed.
Keywords
olaFlow model; composite breakwater; rubble mound; seabed; excess pore pressure; vorticity; turbulent kinetic energy;
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Times Cited By KSCI : 2  (Citation Analysis)
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