Comparison of Numerical Models for Wave Overtopping and Impact on a Sea Wall

Vanneste, Dieter; Altomare, Corrado; Suzuki, Tomohiro; Troch, Peter; Verwaest, T.

doi:10.9753/icce.v34.structures.5

Cited by 16 publications

(15 citation statements)

References 7 publications

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“…Franco and Franco formula [18] for short-crested waves seems to be the closest to FHR results, although the FHR tests were conducted using just long-crested waves. However, the differences due to the "short-crestedness" lie within the scattering of the formula, similar to previous studies [19]. Franco and Franco [18] stated that the directional spreading might allow reducing the freeboard with 30% in respect to cases with only long-crested waves.…”

Section: Vertical Quay Wallsupporting

confidence: 86%

Reduction of Wave Overtopping and Force Impact at Harbor Quays Due to Very Oblique Waves

Dan

Altomare

Suzuki

et al. 2020

JMSE

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Physical model experiments were conducted in a wave tank at Flanders Hydraulics Research, Antwerp, Belgium, to characterize the wave overtopping and impact force on vertical quay walls and sloping sea dike (1:2.5) under very oblique wave attack (angle between 45° and 80°). This study was triggered by the scarce scientific literature on the overtopping and force reduction due to very oblique waves since large reduction is expected for both when compared with the perpendicular wave attack. The study aimed to compare the results from the experimental tests with formulas derived from previous experiments and applicable to a Belgian harbor generic case. The influence of storm return walls and crest berm width on top of the dikes has been analyzed in combination with the wave obliqueness. The results indicate significant reduction of the overtopping due to very oblique waves and new reduction coefficients were proposed. When compared with formulas from previous studies the proposed coefficients indicate the best fit for the overtopping reduction. Position of the storm return wall respect to the quay edge rather than its height was found to be more important for preventing wave induced overtopping. The force reduction is up to approximately 50% for the oblique waves with respect to the perpendicular wave impact and reduction coefficients were proposed for two different configurations a sea dike and vertical quay wall, respectively.

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Section: Vertical Quay Wallsupporting

confidence: 86%

Reduction of Wave Overtopping and Force Impact at Harbor Quays Due to Very Oblique Waves

Dan

Altomare

Suzuki

et al. 2020

JMSE

Self Cite

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“…For example, volume-of-fluid methods (VOF) based on the Reynolds-averaged Navier-Stokes equations (RANS) have been widely employed during the last decades. Using RANS models, processes such as wave transformation [8,19,20], wave overtopping [7,21,22], and wave impact on coastal structures [3,[23][24][25][26] have been modelled and validated, but never before at the same time (to the knowledge of the authors). They are computationally very expensive to apply, but have shown their value particularly for wave-structure interaction phenomena involving complex geometries.…”

Section: Introductionmentioning

confidence: 99%

Validation of RANS Modelling for Wave Interactions with Sea Dikes on Shallow Foreshores Using a Large-Scale Experimental Dataset

Gruwez

Altomare

Suzuki

et al. 2020

JMSE

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In this paper, a Reynolds-averaged Navier–Stokes (RANS) equations solver, interFoam of OpenFOAM®, is validated for wave interactions with a dike, including a promenade and vertical wall, on a shallow foreshore. Such a coastal defence system is comprised of both an impermeable dike and a beach in front of it, forming the shallow foreshore depth at the dike toe. This case necessitates the simulation of several processes simultaneously: wave propagation, wave breaking over the beach slope, and wave interactions with the sea dike, consisting of wave overtopping, bore interactions on the promenade, and bore impacts on the dike-mounted vertical wall at the end of the promenade (storm wall or building). The validation is done using rare large-scale experimental data. Model performance and pattern statistics are employed to quantify the ability of the numerical model to reproduce the experimental data. In the evaluation method, a repeated test is used to estimate the experimental uncertainty. The solver interFoam is shown to generally have a very good model performance rating. A detailed analysis of the complex processes preceding the impacts on the vertical wall proves that a correct reproduction of the horizontal impact force and pressures is highly dependent on the accuracy of reproducing the bore interactions.

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“…In many ways, using the CFD application is like setting up an experiment. The results of an experiment that is not properly set up to imitate a real-life situation would not be reflective of that reality [30]. Modern CFD applications include various branches of physical science that can rely on CFD applications including heat transfer, radiation, nuclear reaction, electromagnetic field, oceanography, vascular medicine, and so on.…”

Section: Cfd Modellingmentioning

confidence: 99%

Study on Wave Overtopping Discharge Affected by Guiding Wall Angle of Wave Dragon Device Using FLOW-3D Software

Mohammad Fadhli Ahmad,

Mohd Azlan Musa,

Muhammad Faris Roslan

et al. 2024

ARASET

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The Wave Energy Converters (WECs) have become the main attraction in producing electricity by converting the wave's energy to electricity. The focus of the WECs is the overtopping of the wave. The higher of overtopping water collected in the basin, the higher the power produced. Producing the higher overtopping also requires higher wave flow rate entry. In the Wave Dragon system, the rate of wave flow entering the reservoir is influenced by the guiding wall (reflector) angles and wave height. Hence, most overtopping concepts have tried to increase the water addition into the pool studying their geometrical parameter, mainly on the guiding wall of Wave Dragon. The unknown effect of the guiding wall angles on the overtopping and effect of the wave characteristic remained. Thus, this study aims to investigate the appropriate guiding wall angle on the influence of different wave heights affecting the performance of the Wave Dragon unit. Then, using FLOW 3D software to apply different guiding wall angles and wave characteristics to the device parameters for investigation. The numerical result highlights that the higher overtopping discharge is obtained during the upper limit of wave height and guiding wall angle. Besides, percentage different between the simulations model and experimental observation, was found at 15%. The result of this study will be beneficial to the industry related to wave potential energy, especially Wave Dragon, and it will also help them improve their device performance.

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Comparison of Numerical Models for Wave Overtopping and Impact on a Sea Wall

Cited by 16 publications

References 7 publications

Reduction of Wave Overtopping and Force Impact at Harbor Quays Due to Very Oblique Waves

Reduction of Wave Overtopping and Force Impact at Harbor Quays Due to Very Oblique Waves

Validation of RANS Modelling for Wave Interactions with Sea Dikes on Shallow Foreshores Using a Large-Scale Experimental Dataset

Study on Wave Overtopping Discharge Affected by Guiding Wall Angle of Wave Dragon Device Using FLOW-3D Software

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