Study of wave–wind interaction at a seawall using a numerical wave channel

Hieu, Phung Dang; Vinh, Phan Ngoc; Toan, Du Van; Sơn, Nguyễn Thanh

doi:10.1016/j.apm.2014.04.038

Cited by 17 publications

(6 citation statements)

References 6 publications

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“…Although the numerical data used to infer Eq. 11 derive from a rough modelling (single-fluid approach), its reliability has been confirmed by comparing computed wind factors with those of Hieu et al (2014). The latter were obtained by performing numerical experiments with the two-fluids technique.…”

Section: The Wind Factor Fwindmentioning

confidence: 76%

“…Most of the literature, indeed, has investigated this phenomenon through physical modelling (among the others, de Waal 1996, Wolters 2007, Durbridge 2021, experiencing some difficulties as both Froude and Reynolds scales are needed to analyze the wind effect on the overtopping process. On the other hand, a few numerical studies have examined this phenomenon (Kiku and Kawasaki 2014, Hieu 2014, Xie 2014., Di Leo et al, 2022, although numerical models have the advantage of avoiding scale effects associated with laboratory experiments. Moreover, only a few studies have proposed predictive equation to quantitatively estimate the influence of wind on wave overtopping.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Wind Stress on Wave Overtopping on Vertical Seawall

Tuozzo,

Leo,

Buccino

et al. 2023

Int. Conf. Coastal. Eng.

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Onshore wind can significantly affect wave overtopping process and increase mean overtopping discharge. Thus, the wind should be an important variable in coastal design process. However, despite many researches have analyzed the influence of wind on the overtopping, there is still a lack of exhaustive knowledge about this phenomenon. To further analyze the wind effects, the CFD model FLOW-3D has been used to investigate wave overtopping at vertical seawalls. The single-fluid approach has been adopted, i.e. the presence of wind has been simulated via the wind shear stress on the sea surface. The main aim of this work is to verify the ability of this simplified numerical modelling to capture the macro-processes involved in the phenomenon of wave overtopping. The presence of wind shear stress has led to physically consistent results. It confirmed that as the mean overtopping discharge decreases, as the wind effect increases. Furthermore, numerical results have shown that the advection of water droplets behind the structure by the wind is the key mechanism for the enhancement of wave overtopping. Finally, by gathering numerical results and laboratory data carried out by Durbridge (2021), a new predictive formula to estimate the wind factor is provided.

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Section: The Wind Factor Fwindmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

The Effect of Wind Stress on Wave Overtopping on Vertical Seawall

Tuozzo,

Leo,

Buccino

et al. 2023

Int. Conf. Coastal. Eng.

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“…For the incompressible fluid motion due to wave-current interaction with the free surface, the governing equations are the RANS equations and mass conservation equations [15]:…”

Section: A Governing Equationsmentioning

confidence: 99%

Linear and Nonlinear Wave-Current Interactions over Constant Water Depth

Xing¹

2018

JOCET

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Nowadays, the exploration of the ocean energy has become necessary and attracted more and more attention by the researchers all over the world due to the pollution and energy depletion issues caused by the consumption of fossil energies. As designing and hydrodynamic analysis of the energy converters in physical experimental tank are both time consuming and expensive, many researchers have developed numerical wave tanks to investigate the problem of wave and current interacting with the energy converters. In this paper, a numerical wave and current tank of the viscous fluid with constant depth is established based on the Reynolds-Averaged Navier-Stokes (RANS) equations with k-ε turbulence closure scheme. The volume of fluid (VOF) method is applied to accurately capture the water free surface. The wave generation, wave absorption and current absorption are accomplished by using the analytic relaxation approach. Based on the numerical wave and current tank established here, the linear wave and nonlinear wave-current interactions are simulated and analyzed. The result shows that the wave generated by using the analytic relaxation approach has the feature of high quality and stability. The numerical results of the linear wave-current interaction are compared with the analytical solution based on the perturbation method, which shows that the numerical wave and current tank established here is accurate and valid. Finally, the influence of current velocity on the wave parameters and the variation of wave crests with wave slopes for linear and nonlinear wave-current interactions are also numerically investigated. Index Terms-Wave-current interaction, analytic relaxation approach, numerical wave and current tank, user defined function. I. INTRODUCTION Ocean energy-one type of renewable, clean and green energy has attracted more and more attention due to its huge energy potential. However, there still exist many technical issues and barriers in the exploration of the ocean energy. In order to solve these issues, it is important to carry out the

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“…By imposing wind shear stress on the ocean surface using an empirical formula, Di Leo et al [17] evaluated the effect of wind on wave overtopping of vertical walls. In recent years, high-resolution two-phase flow solvers have been applied to analyze the complex phenomena within wave-wind interactions, such as the effects of winds on wave transformation [18], wave overtopping [19], wave breaking [20], wave hydrodynamics of fringing reefs [21], and the joint impact of wind and waves on coastal structures [22].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Loads and Overtopping Processes of a Coastal Seawall under the Coupled Impact of Extreme Waves and Wind

Yuan,

Wang,

et al. 2023

JMSE

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Driven by strong winds, huge ocean waves can cause devastating destruction to coastal regions during harsh weather events. There is growing evidence showing that extreme waves can occur in both shallow and deep waters. To protect the coast against the destructive power of huge waves, coastal protection facilities, such as seawalls, are often built along the coast. The integrity and stability of these coastal protection facilities are essential to the safety of coastal regions. Since huge waves are often accompanied by strong winds in real ocean environments, to fill the knowledge gap left by previous relevant studies, this study numerically investigates the hydrodynamic loads and overtopping of a coastal seawall model on a sloped beach under the coupled impact of an extreme wave group and wind. The influences of several main factors are considered, such as water depth, wind speed, and significant wave height. The research results reveal that strong wind can greatly increase the average overtopping rate and enhance the hydrodynamic loads exerted by the extreme wave group on the seawall.

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Study of wave–wind interaction at a seawall using a numerical wave channel

Cited by 17 publications

References 6 publications

The Effect of Wind Stress on Wave Overtopping on Vertical Seawall

The Effect of Wind Stress on Wave Overtopping on Vertical Seawall

Linear and Nonlinear Wave-Current Interactions over Constant Water Depth

Hydrodynamic Loads and Overtopping Processes of a Coastal Seawall under the Coupled Impact of Extreme Waves and Wind

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