Performance of an inclined thin plate in wave attenuation

Acanal, Lami; Loukogeorgaki, Eva; Yağci, Oral; Kirca, V.Ş. Özgür; Akgul, Mehmet

doi:10.2112/si65-025.1

Cited by 13 publications

(3 citation statements)

References 12 publications

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“…Besides, a better performance of CWB was seen in the context of steep waves (Subekti and Shulhany 2021;Subekti et al 2019;Ajiwibowo 2018;Elsheikh et al 2022). In addition, some research was also done regarding inclined curtain walls, Yagci et al (2014); Acanal et al (2013) investigated inclined curtain walls for shallow inclined plated 0° to 15°. Within the experiments, the inclination between 0° to 15° did not reveal a significant impact to the transmission coefficient, however best wave attenuation could be attributed to the combination of the largest inclination with the largest submergence.…”

Section: Introductionmentioning

confidence: 99%

Investigating Wave Transmission through Curtain Wall Breakwaters under Variable Conditions

Vu,

Zemann,

Oberle

et al. 2022

Journal of Coastal and Hydraulic Structures

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Coastal erosion has become a pressing problem all over the world, especially in areas where the hinterland is only slightly elevated over the sea level. The ongoing progression reveals the urging need for engineered coastal protection measures like breakwaters. Amongst others, curtain wall breakwater types (CWB) have proven their potential to dissipate the wave energy in multiple studies. Their application is often considered in situations where only a partial protection of the coast is needed (e.g. to maintain a hydraulic connectivity or enable sediment transport for land reclamation). Due to their slender design, they are assumed to offer an economical alternative in comparison to massive breakwater constructions, while their pillar-based foundation shows advantages for applications under soft soil conditions. Within the development process of a detached breakwater to face coastal erosion in the Mekong Delta, different types of CWB configurations have been investigated under regular wave conditions. Several characteristics of CWB structures such as the inclination and thickness of the wall, the height of the structures, the rate of submergence and emergence were examined for different water depths and wave parameters. The wave-structure interaction was analyzed using FLOW3D software, which is capable of simulating wave transformation. It showed a high agreement in comparison with own experimental investigations and the wave theory. The results showed a continuous reduction of the wave transmission coefficient with increasing inclination from 90° to 135°, whilst the orientation of the inclination (e.g. 60° vs 120°) only showed a minor effect regarding the wave reduction. All CWB arrangements showed increasing performance with decreasing wave periods. Besides, the wave transmission was mainly impacted by the level of submergence together with the amount of supporting piers and the thickness of the structures. Water depth changes due to tidal influence revealed an increase in wave transmission coefficient once the wave started to overtop the structure.

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Section: Introductionmentioning

confidence: 99%

Investigating Wave Transmission through Curtain Wall Breakwaters under Variable Conditions

Vu,

Zemann,

Oberle

et al. 2022

Journal of Coastal and Hydraulic Structures

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“…Floating plate is a classical type of free surface breakwater, which has proved useful in reducing wave transmission (e.g. Patarapanich and Cheong, 1989;Neelamani and Reddy, 1992;Neelamani and Gayathri, 2006;Dong et al, 2008;Zidan et al, 2012;Koraim, 2013;Acanal et al, 2013). To have sufficient wave height reduction by a floating plate-type breakwater, the structure is usually designed to be a long thin plate or a large box.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations of wave propagation over a vegetated platform

Chen

Jin

et al. 2016

Coastal Engineering

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Vegetated platforms have been constructed in recent years for the purpose of shore protection. This paper addresses some fundamental questions concerning the vegetated platform: (1) What is the difference in wave attenuation between a vegetated platform and a simple platform, and how much can vegetation increase the efficiency of reducing wave transmission? (2) Are there any differences between the effects of stems and roots on wave attenuation? (3) Does vegetation always reduce wave transmission? (4) Is it possible to develop an empirical formula for estimating the wave transmission of a vegetated platform? To answer the above questions, a numerical model solving the Navier-Stokes equations for wave propagation over a vegetated platform is established and validated by several existing laboratory experiments. A total of 244 numerical experiments based on this model have been carried out. The simulated results suggest that the platform plays a major role and the vegetation plays a supporting role in reducing wave transmission except for some special cases. Stems tend to have a larger influence than roots in reducing wave transmission with the same height. The roots always help reduce wave transmission, while the stems may increase wave transmission when the platform width is in the range of 37.5-62.5% of the incident wavelength. Based on our numerical experiments and existing laboratory data, the paper proposes a simple formula for predicting the wave transmission coefficient of a vegetated platform for engineering applications.

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“…size) of the armor units and the volume of RMB dramatically decreases. The study by Acanal et al [1] pointed out that the size (i.e. nominal diameter) of required armor unit can be decreased up to 3.5 times when ITP is applied in tandem at the seaward of an RMB.…”

Section: Introductionmentioning

confidence: 99%