Comparison of new large and small scale overtopping tests for rubble mound breakwaters

Andersen, Thomas Lykke; Burcharth, Hans F.; Gironella, X.

doi:10.1016/j.coastaleng.2010.12.004

Cited by 21 publications

(18 citation statements)

References 14 publications

(19 reference statements)

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“…The physical model was scaled using the Froude similarity law with Reynolds number higher than 30,000 in the armor layer. The tests adequately represented significant prototype overtopping discharges, according to Lykke-Andersen et al [18]. Under these conditions, the flow conditions in the outer zone of the breakwater were also turbulent.…”

Section: Physical Modelmentioning

confidence: 70%

Influence of Parapets on Wave Overtopping on Mound Breakwaters with Crown Walls

et al. 2019

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Background literature on the influence of parapets on the overtopping of mound breakwaters is limited. In this study, numerical tests were conducted using computational fluid dynamics (CFD) to analyze the influence of nine crown wall geometries (seven with parapets). The CFD model was implemented in OpenFOAM ® and successfully validated with laboratory tests. A new estimator of the dimensionless mean wave-overtopping discharges (logQ) on structures with parapets is proposed. The new estimator depends on the estimation of logQ of the same structure without a parapet. The effects on wave overtopping of the parapet angle (ε p ), parapet width (w p ), and parapet height (h p ) were analyzed. Low values of ε p and w p /h p ≈ 1 produced the highest parapet effectiveness to reduce the mean wave-overtopping discharges.

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Section: Physical Modelmentioning

confidence: 70%

Influence of Parapets on Wave Overtopping on Mound Breakwaters with Crown Walls

et al. 2019

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“…Here the flow has similarities with a rough bottom channel flow. At the upper part of the slope the run-up wedge thickness is less than the roughness, which may resemble flow around obstacles as also described in Andersen et al (2011). The effect of the roughness elements on the bed is clearly seen at the front of the upper surface wedge.…”

Section: Wave Run-up and Run-down Cyclementioning

confidence: 82%

“…The armour layer flow has typically been included via model scale experiments where the entire structure including the porous core is constructed in laboratory scale and exposed to wave action. Recent examples on such experiments are Andersen et al (2011) and Burcharth et al (2006) where stability and overtopping is investigated. In addition to stability and overtopping also the flow through the porous material of the structure is studied e.g.…”

Section: Introductionmentioning

confidence: 99%

Wave Interaction With Large Roughness Elements on an Impermeable Sloping Bed

Jensen

Christensen

Sumer

2012

Int. Conf. Coastal. Eng.

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The present paper presents the results of an experimental and numerical investigation of the flow between large roughness elements on a steep sloping impermeable bed during wave action. The setup is designed to resemble a breakwater structure. The work is part of a study where the focus is on the details in the porous core flow and the armour layer flow i.e. the interaction between the two flow domains and the effect on the armour layer stability. In order to isolate the processes involved with the flow in the porous core the investigations are first carried out with a completely impermeable bed and successively repeated with a porous bed. In this paper the focus is on the impermeable bed. Results are obtained experimentally for flow and turbulence between the roughness elements on the sloping bed. Numerical simulations have reproduced the experimental results with good agreements and can hereby add more details to the understanding of the fluid-structure interaction.

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“…This condition is respected for the performed tests, in which the Reynolds number is approximately 4 · 10 4 . Clearly, other processes such as run-up, overtopping, bed erosion and toe scour may be affected by scale affects also for larger Reynolds numbers (De Rouck et al, 2005;Lykke Andersen et al, 2010;Martinelli et al, 2006).…”

Section: Model Stone Unitsmentioning

confidence: 99%