A Numerical Investigation of the Reduction of Solitary Wave Runup by A Row of Vertical Slotted Piles

Yao, Yu; Jia, Meijun; Mao, Dawei; Deng, Zhengzhi; Liu, Xiaojian

doi:10.1007/s13344-020-0002-z

Cited by 8 publications

(4 citation statements)

References 35 publications

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“…Figure 8 presented the wave surface elevation time histories at the different wave gauges, a numerical reference wave gauge (t=0) WG01 is placed at x=1.1 m from the toe of the slope, the wave height of the solitary wave remains mostly constant along the flat flume bottom WG01 for all case studies, suggesting good simulation accuracy, we also observed reflected waves depending to the number of steps, six waves for the first case, three waves for the second case, and two waves for the third case, a last reflected wave (t=8 s) due to the seawall, according to Yao et al [20], Chergui and Bouzit [40] the reflected wave increase with increasing of step height Sh.…”

Section: Wave Surface Elevations and Overtopping On Stepped Structure...supporting

confidence: 79%

“…To solve this model, the PISO scheme is used for pressure velocity coupling, for calculations momentum and volume fraction we utilize second-order upwind and compressive schemes, respectively [18,20,21]. First-order transient methods are employed using an Explicit formulation.…”

Section: Governing Equationsmentioning

confidence: 99%

“…Further comparative analysis by Wu [19] of different k-ε turbulence models indicated a superior accuracy of results yielded by the k-ε RNG model. Numerical investigations undertaken by Yao et al [20] focused on the reduction of tsunami-like solitary wave run-up by pile breakwaters on varying sloping beaches. The application of Computational Fluid Dynamics (CFD), a popular tool for addressing a wide variety of research and engineering queries across diverse fields and industries, underpins these investigations.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Stepped Structures on Tsunami Wave Propagation and Overtopping Engineering

Chergui,

Bouzit

2023

IJSSE

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The urgent necessity to fortify coastal regions and safeguard both the natural environment and key coastal infrastructure underscores the significance of structural measures in coastal engineering. Among these, the seawall reigns as the primary fortification method. This study aims to elucidate the impact of a stepped structure on the propagation and overtopping of solitary waves when they encounter an impermeable seawall. The investigation has been conducted using ANSYS Fluent, a widely recognized commercial software. Although previous researchers have extensively used the two-dimensional volume of fluid (VOF) model, based on the Reynolds-Averaged Navier-Stokes (RANS) equations and the k-ε turbulence closure solver, this study fills the gap in the understanding of the stepped structure's effect. It shows a commendable agreement with experimental results, proving its reliability. Simulations were executed with varied configurations of stepped structures (Step width Sw=0.6 m, 1.2 m, 1.8 m, and Step height Sh=0.3 m, 0.6 m, 0.9 m), emulating tsunami waves of constant wave height and water depth over a stepped structure on a 1:20 sloped beach. Initially, the accuracy of the results was substantiated by comparing them with experimental and numerical data of the free surface and the distribution of the pressure field on the seawall. Numerical simulations, incorporating varying wave heights, water depths, and step heights, were performed to scrutinize the evolution of waves and the pressure exerted by waves impacting the seawall.

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Section: Wave Surface Elevations and Overtopping On Stepped Structure...supporting

confidence: 79%

Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of Stepped Structures on Tsunami Wave Propagation and Overtopping Engineering

Chergui,

Bouzit

2023

IJSSE

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“…A popular model in fluid dynamics to be approached numerically is the Navier-Stokes equations [16]- [20]. Despite their high accuracy, these equations are not entirely practical for modeling since they are complicated and require finer grids to simulate, making them computationally expensive [21].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Wave Run-up to Identify the Most Effective Design of Jakarta’s Outer Sea Dike

Magdalena¹,

Sutjianto²,

Sunaryan³

et al. 2022

International Journal on Advanced Science, Engineering and Information Technology

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The National Capital Integrated Coastal Development (NCICD) is a construction megaproject around Jakarta Bay targeted environmental revitalization and flood mitigation. One of the main projects of NCICD is to develop the Jakarta's outer sea dike to prevent future disasters triggered by the increase of the sea level around Jakarta Bay. In this paper, we aim to assess and optimize the design of Jakarta's outer sea dike by investigating the wave run-up phenomenon, which is measured as the maximum vertical extent of wave uprush on a structure above the still water level. We used the Non-linear Shallow Water Equations (NSWE) as our mathematical model to simulate this phenomenon. The NSWE model was solved numerically using the finite volume method on a staggered grid with a wet-dry procedure to obtain accurate wave run-up height. To validate our numerical scheme, we conducted benchmark tests against a publicized experimental dataset, resulting in a good agreement between the numerical and experimental data, which confirms the robustness and accuracy of our model. We then simulate the wave run-up over three different sea dike profiles: single slope, single berm, and single berm with rocks. Our study shows that among the cases we investigated, the single berm with rocks is the most effective design of the sea dike as even small-sized rock units can significantly reduce the wave run-up height.

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Investigation on hydrodynamic performance of an environmentally friendly pile breakwater

et al. 2020

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A Numerical Investigation of the Reduction of Solitary Wave Runup by A Row of Vertical Slotted Piles

Cited by 8 publications

References 35 publications

Impact of Stepped Structures on Tsunami Wave Propagation and Overtopping Engineering

Impact of Stepped Structures on Tsunami Wave Propagation and Overtopping Engineering

Numerical Study on Wave Run-up to Identify the Most Effective Design of Jakarta’s Outer Sea Dike

Investigation on hydrodynamic performance of an environmentally friendly pile breakwater

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