Wave attenuation and flow kinematics of an inclined thin plate acting as an alternative coastal protection structure

Yağci, Oral; Kirca, V.Ş. Özgür; Acanal, Lami

doi:10.1016/j.apor.2014.09.003

Cited by 15 publications

(7 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A plate type fixed free surface breakwater dissipates energy through wave overtopping, breaking, return flow and disturbance of the wave orbital path [32].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Force and water jet impact reduction on adjacent structures by means of free surface breakwaters

Holkema,

Aalbers,

Wellens

2023

ISP

View full text Add to dashboard Cite

In head waves, water jet impacts due to run up can occur as a result of the structural configuration of some floating structures, reducing workability. Wave attenuation near the floater may reduce the risk of water jet impacts. This paper presents a numerical study of the performance and attenuation mechanisms of various plate type fixed free surface breakwaters and their ability to prevent water jet impacts on adjacent structures. Simulations are performed in two dimensions with a numerical method based on the Navier–Stokes equations in the presence of a free surface. The breakwater models are evaluated in two irregular sea states in terms of wave transmission, reflection and energy dissipation and by their ability to reduce water jets impacts on adjacent structures. A 60 degree inclined plate is found to induce a large wave energy reduction, little wave transmission and reflection and to experience little wave loading while effectively reducing water jet impacts.

show abstract

“…A plate type fixed free surface breakwater dissipates energy through wave overtopping, breaking, return flow and disturbance of the wave orbital path [32].…”

Section: Introductionmentioning

confidence: 99%

“…An inclined plate can induce run-up and, hence, more wave breaking compared to a vertical plate, yielding larger wave energy dissipation and thus a smaller mean net force on the breakwater. However, an increase in wave breaking may increase transient forces [32].…”

Section: Introductionmentioning

confidence: 99%

Force and water jet impact reduction on adjacent structures by means of free surface breakwaters

Holkema,

Aalbers,

Wellens

2023

ISP

View full text Add to dashboard Cite

show abstract

“…Considering the wide range of possible setups and configurations regarding the curtain submergence and emergence, its thickness, and the pile arrangement for foundations, unsurprisingly a lot of different geometric and functional concepts can be found in the literature, namely pile-supported skirt breakwaters/bars (Laju et al 2011;Koraim 2014), vertical (slotted) wall breakwaters/barriers (Ursell 1947;Isaacson et al 1998;), wave screen breakwaters (Atkins 2019), submerged (inclined) plates (Parsons and Martin 1992;Yagci et al 2014;Cho and Kim 2008), or curtainwall(-pile) breakwaters (Subekti et al 2019;Ajiwibowo 2018;Lee et al 2009;Zhu et al 2015;Nejadkazem and Mostafa Gharabaghi 2013;Liu and Li 2011;Suh et al 2007). All of these refer to a breakwater which is founded on piles featuring a partially submerged and emerged wall, leaving a gap between the seafloor and the lower edge of the wall.…”

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

View full text Add to dashboard Cite

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.

show abstract

“…The large mass density of water (1000 times greater than air), and the large spatial area which the energy transfer from the wind to the ocean is integrated, results in enormous amounts of momentum transported by the waves. Understanding and modelling the kinematics of water waves is, therefore, important in fields such as coastal protection [2], naval architecture [3], offshore oil and gas [4], and marine renewables [5]. For example, Gudmestad [4] highlights the importance of the accurate description of the wave kinematics, stating that the use of different kinematic models, can lead to differences of up to 75% in the estimated load on offshore structures.…”

Section: Introductionmentioning

confidence: 99%

“…Figure5: Horizontal velocity profiles, using velocity extrapolation (solid lines) and Wheeler stretching (dashed lines), underneath crests (v(2) > 0) and troughs (v(2) < 0), for waves I1-I6 (a) and D1-D5 (b).…”

mentioning

confidence: 99%

Assessing the validity of regular wave theory in a short physical wave flume using particle image velocimetry

Windt

Untrau

Davidson

et al. 2021

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

Wave attenuation and flow kinematics of an inclined thin plate acting as an alternative coastal protection structure

Cited by 15 publications

References 21 publications

Force and water jet impact reduction on adjacent structures by means of free surface breakwaters

Force and water jet impact reduction on adjacent structures by means of free surface breakwaters

Investigating Wave Transmission through Curtain Wall Breakwaters under Variable Conditions

Assessing the validity of regular wave theory in a short physical wave flume using particle image velocimetry

Contact Info

Product

Resources

About