Estimation of the transmission coefficients of wave height and period after smooth submerged breakwater using a non-hydrostatic wave model

Zhang, Na; Zhang, Qinghe; Zou, Guoliang; Jiang, Xuelian

doi:10.1016/j.oceaneng.2016.06.037

Cited by 13 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, unlike Kr's case, for sloping structures, the higher the wave steepness is followed by the decrease in Kt, but for the upright structure, the greater the wave steepness, the Kt tends to increase. Lorenzo et al [11] also mention that the influence of the crest width (B) should be studied, as its effects on wave transmission are significant, according to previous studies by [16]- [18]. The effect of crest width (B) was also simulated in this study.…”

Section: Resultsmentioning

confidence: 77%

Physical Model Simulation: Influences the Shape of Breakwater Structures on the Coefficient of Transmission and Reflection

Pujianiki¹,

Dayanti²

2021

Int. J. Adv. Sci. Eng. Inf. Technol.

View full text Add to dashboard Cite

Breakwater is used to break the wave energy that travels towards the beach. Part of the wave energy will be destroyed, transmitted, or reflected. The shape of breakwater affects the ability to break the wave energy. There are no researchers who have compared the effect of the shape of the breakwater structure on wave energy transmitted and reflected. This study aims to simulate the transmission coefficient (Kt) and reflection coefficient (Kr) of the breakwater in various forms. Physical models with a 1:100 scale model is used. A flap-type wave generator in a wave flume is used to generate the wave. Waves regularly move in one direction passed the model. The results showed an effect of the shape of the breakwater structure on Kt and Kr. By increasing the wave steepness (Hi/L), Kt's value will increase in the upright structure and decrease in the sloping structure. At the same time, the value of Kr tends to decrease when the wave steepness increases. The value of Kt is relatively smaller in upright structures than in sloping structures. By adding porosity to the structure, the Kt value will increase, followed by Kr's reduction. By increasing the crest B's width, Kt appears to increase, but the crest width does not significantly affect Kr. Kt and Kr are significantly smaller if the breakwater structure is inclined towards the sea or inverted trapezium. This type of breakwater has never been encountered in the field before.

show abstract

Section: Resultsmentioning

confidence: 77%

Physical Model Simulation: Influences the Shape of Breakwater Structures on the Coefficient of Transmission and Reflection

Pujianiki¹,

Dayanti²

2021

Int. J. Adv. Sci. Eng. Inf. Technol.

View full text Add to dashboard Cite

show abstract

“…The SWASH wave model has been proved to be applicable to wave propagation, deformation and overtopping of smooth breakwaters [23,24]. In this section, it will be further applied to the wave overtopping simulation over a breakwater with an Accropode armor.…”

Section: Model Setup and Validationmentioning

confidence: 99%

“…The three-dimensional non-hydrostatic wave model, developed rapidly in recent years, may be a compromise between computational cost and accuracy on wave overtopping simulation [19,20]. A non-hydrostatic wave model can simulate the wave propagation by solving the nonlinear shallow-water equations with non-hydrostatic terms [21][22][23]. In the vertical direction, only two or three layers are needed to model the strong nonlinear and dispersive waves, while both the accuracy requirement and high simulation efficiency can be contented for wave transformation in areas near the shore.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Wave Overtopping on Breakwater with an Armor Layer of Accropode Using SWASH Model

Zhang

Wang

et al. 2020

Water

Self Cite

View full text Add to dashboard Cite

In this paper, a new method for predicting wave overtopping discharges of Accropode armored breakwaters using the non-hydrostatic wave model Simulating WAves till SHore (SWASH) is presented. The apparent friction coefficient concept is proposed to allow the bottom shear stress term calculated in the momentum equation to reasonably represent the effect of comprehensive energy dissipation caused by the roughness and seepage during the wave overtopping process. A large number of wave overtopping cases are simulated with a calibrated SWASH model to determine the values of equivalent roughness coefficients so that the apparent friction coefficients can be estimated to achieve the conditions with good agreement between numerical overtopping discharges and those from the EurOtop neural network model. The relative crest freeboard and the wave steepness are found to be the two main factors affecting the equivalent roughness coefficient. A derived empirical formula for the estimation of an equivalent roughness coefficient is presented. The simulated overtopping discharges by the SWASH model using the values of the equivalent roughness coefficient estimated from the empirical formula are compared with the physical model test results. It is found that the mean error rate from the present model predictions is 0.24, which is slightly better than the mean error rate of 0.26 from the EurOtop neural network model.

show abstract

An overtopping formula for shallow water vertical seawalls by SWASH

Tuozzo,

Calabrese,

Buccino

2024

Applied Ocean Research

View full text Add to dashboard Cite

Estimation of the transmission coefficients of wave height and period after smooth submerged breakwater using a non-hydrostatic wave model

Cited by 13 publications

References 24 publications

Physical Model Simulation: Influences the Shape of Breakwater Structures on the Coefficient of Transmission and Reflection

Physical Model Simulation: Influences the Shape of Breakwater Structures on the Coefficient of Transmission and Reflection

Numerical Simulation of Wave Overtopping on Breakwater with an Armor Layer of Accropode Using SWASH Model

An overtopping formula for shallow water vertical seawalls by SWASH

Contact Info

Product

Resources

About