Breaking Wave Characteristics for the Loading of a Slender Pile

Irschik, Kai; Sparboom, Uwe; Oumeraci, Hocine

doi:10.1142/9789812791306_0113

Cited by 13 publications

(21 citation statements)

References 7 publications

(8 reference statements)

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“…This paper deals only with a series of tests of non-breaking monochromatic and solitary waves with the pile placed on flat bottom of the flume at a distance of 111 m from the wavemaker (see Figure 2). Additional details on the test set-up are given in [18] and [19]. To measure wave forces, strain gauges were installed at the two bearings (top and bottom) of the cylinder.…”

Section: Laboratory Set-up In the Gkw Experimentsmentioning

confidence: 99%

A 3D numerical model for computing non-breaking wave forces on slender piles

Irschik²,

Oumeraci³

et al. 2006

J Eng Math

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In this paper we validate a numerical model for water-wave-body interaction by comparing the numerical results with laboratory data. The numerical model is based on the Euler's equation without considering the effects of energy dissipation. The Euler's equations are solved by a two-step projection finite volume scheme and the free surface displacements are tracked by the volume of fluid method. The numerical model is used to simulate solitary wave as well as periodic waves and their interaction with a vertical slender pile. A very good agreement between the experimental data and numerical results is observed for the time history of free surface displacement, fluid particle velocity, and dynamic pressure on the pile.

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Section: Laboratory Set-up In the Gkw Experimentsmentioning

confidence: 99%

A 3D numerical model for computing non-breaking wave forces on slender piles

Irschik²,

Oumeraci³

et al. 2006

J Eng Math

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“…Additionally, 4 wave gauges were fixed at the cylinder. The locations of pressure cells and current meters have been reported in Irschik et al (2002).…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

Breaking Wave Loads on a Slender Pile in Shallow Water

Irschik¹,

Sparboom²,

Oumeraci³

2005

Coastal Engineering 2004

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The load of breaking waves distinguishes from the impact of non -breaking waves in the superposition of an additional, transient force of short duration. A simple method is presented to decompose the quasi -static force, the periodic part of the total measured force, and the dynamic component, which is the response of the cylinder due to the additional impact. The method is verified with large-scale model tests. The tests were carried out in the Large Wave Channel (GWK) with a slender, vertical and inclined cylindrical pile located at the end of a 1:10 slope. Finally the impact and the curling factor λ, an empirical coefficient to calculate the height of the impact area, is determined and compared to published data from laboratory deep water experiments.

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“…The cylinder corresponds to a 1 : 8.6 scale of an offshore wind substructure at the alpha ventus test site Wienke and Oumeraci (2005). The wave breaking point is determined to be x b = 13.2 m and the overturning wave crest impacts the surface of the cylinder just below the wave crest level at x = 14.65 m. This location of the cylinder with respect to the wave breaking point results in large breaking wave forces Irschik et al (2002); Kamath et al (2016). The calculated wave forces on the cylinder are presented in Fig.(8).…”

Section: Focused Wave Breakingmentioning

confidence: 99%

Extreme Wave Generation, Breaking, and Impact Simulations Using Wave Packets in REEF3D

Bihs

Kamath

Chella

et al. 2019

Journal of Offshore Mechanics and Arctic Engineering

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On several occasions, freak waves have been observed in the past, some causing severe damage. In order to model such extreme wave conditions, one possibility is to use focused waves of first- or second-order based on irregular sea-state wave spectra. The wave phase is chosen such that the waves focus at a predetermined location and time, but the individual wave components become steep and start breaking before the focus location for large amplitudes. In this study, transient wave packets are used for extreme wave generation. Extreme waves are generated that are higher and only break at the concentration point using the transient wave packets method implemented in the open-source CFD model REEF3D. Model validation is performed by comparison to experimental results. The generation of wave packets with an 8.3 times shorter focus distance is investigated and the wave is replicated in a shorter domain with a 9% higher crest. The method is further used to generate a steepness induced-breaking wave and calculation of extreme wave forces on an offshore structure is demonstrated.

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Breaking Wave Characteristics for the Loading of a Slender Pile

Cited by 13 publications

References 7 publications

A 3D numerical model for computing non-breaking wave forces on slender piles

A 3D numerical model for computing non-breaking wave forces on slender piles

Breaking Wave Loads on a Slender Pile in Shallow Water

Extreme Wave Generation, Breaking, and Impact Simulations Using Wave Packets in REEF3D

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