Flow under standing waves Part 2. Scour and deposition in front of breakwaters

Publication: Research - peer-reviewJournal article – Annual report year: 2009

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A 3-D general purpose Navier-Stokes solver was used to calculate the 2-D flow in front of the breakwater. The k-omega, SST (shear-stress transport) model was selected as the turbulence model. The morphologic model of the present code couples the flow solution with a sediment transport description and routines for, updating the computational mesh based on the mass balance of sediment. Laboratory experiments of scour also were conducted in a wave flume to obtain data for model verification. Both in the numerical simulations and in the laboratory experiment, two kinds of breakwaters were used: A vertical-wall breakwater; and a sloping-wall breakwater (Slope: 1:1.5). Numerically obtained scour-deposition profiles were compared with the experiments. The numerical results show that the equilibrium scour depth normalized by the wave height decreases with increasing water-depth-to-wave-length ratio. Although the numerical results obtained for vertical-wall breakwaters are consistent with the existing experimental data (including the present experiment), the numerical results for the sloping-wall case appear to be not very satisfactory.
Original languageEnglish
JournalCoastal Engineering
Publication date2009
Volume56
Issue3
Pages363-370
ISSN0378-3839
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 3

Keywords

  • Breakwaters, Steady streaming, Standing waves, Scour, Deposition, Bed morphology, Waves, Turbulence modelling
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