Numerical Investigation of Solitary Wave Interaction with Double Row of Vertical Slotted Piles

Yao, Yu; Tang, Zhengjiang; He, Fulian; Yuan, Wancheng

doi:10.1061/(asce)em.1943-7889.0001381

Cited by 17 publications

(5 citation statements)

References 39 publications

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“…Further, numerical modelling studies by Mojtahedi et al 22 proved that the pile breakwater with rectangular shaped piles has about 7% to 30% higher reflection than the circular-shaped piles. Single row 23 and two rows 24 of pile breakwater under solitary waves (resemble tsunami waves) were numerically investigated using the computational fluid dynamics tool OpenFOAM. In the case of two rows, the front row of piles experienced higher wave run-up and impact force due to the sheltering effect.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on innovative pile head breakwater for coastal protection

Sathyanarayana

Suvarna

Umesh

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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Coastal erosion is a global concern that has been augmenting due to the natural evolution of beaches, human activities and sea-level rise. One of the eco-friendly shore protection methods is to dissipate the wave energy by constructing offshore breakwaters. Conical pile head breakwater (CPHB) is one of the eco-friendly innovative offshore structures consisting of closely spaced piles with an enlarged cross-sectional area (conical pile head) in the vicinity of the free surface. In the present study, perforations are incorporated over the conical pile head to achieve higher efficiency by promoting energy dissipation. The influence of the perforations on the performance characteristics, namely wave transmission (Kt), wave reflection (Kr) and energy dissipation (Kd) of the perforated CPHB is comprehensively investigated through physical model studies. The effect of perforations and their distribution around the pile head (Pa), percentage of perforation (P) and size of perforations (S/D) on the wave attenuation characteristics are evaluated to arrive at an optimum configuration. The study is carried out under monochromatic waves of varying wave height (0.06–0.16 m) and wave period (1.4–2 s) at different depths of water (0.35, 0.40 and 0.45 m). A minimum Kt of 0.58 associated with Kr of 0.26 and Kd of 0.78 is obtained with an optimum configuration of Pa = 50%, P = 19.2% and S/D = 0.25. The Kt of the proposed CPHB is about 19 to 35% lesser than that of the perforated hollow pile breakwater under matching test conditions. Overall, providing the perforations is found to be effective in enhancing the wave attenuation capability by up to 12.4%. Further, empirical equations are formulated and validated with the experimental data. The empirical equations estimate the Kt and Kr values accurately with a high coefficient of determination ( R2 ≥ 0.90).

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Section: Introductionmentioning

confidence: 99%

“…In the case of two rows, the front row of piles experienced higher wave run-up and impact force due to the sheltering effect. 24 Some of the important pile structures investigated by various authors available in the literature and relevant to the present work are illustrated in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Investigation on innovative pile head breakwater for coastal protection

Sathyanarayana

Suvarna

Umesh

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…Based on the mild slope equation and the radiation stress theory, the intensity of wave setup and waveinduced current were estimated by Massel and Gourlay [15]. Yao numerically investigated the tsunami-like solitary waves propagating over certain photography [16]. Similarly, the Boussinesq model has proved to be capable of predicting the wave height and mean water level over different reef profiles and describing the complex changes to the wave spectrum over reef flat [17,18].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Wave Dynamics over Island Reefs Based on Smoothed Particle Hydrodynamics Method

Wang

Sun

et al. 2022

Mathematical Problems in Engineering

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Coastal areas are suffering from an increasing number of hazards like storm surge or flooding. Luckily, reefs can reduce the risk because of their particular wave dynamic characteristics. In this study, a numerical wave flume is established to simulate the topography of fringing reefs around islands. The smoothed particle hydrodynamics- (SPH-) finite particle method (FPM) scheme is used to deal with Navier–Stokes equations, and the boundary repulsion method is used to deal with the solid wall boundary. The wave propagating and breaking processes over island reefs under regular wave incidence are simulated. The results are compared with the experimental results in the literature, showing that the numerical model can simulate the wave propagating process on the island reef terrain very well. The wave propagation over the island reef terrain experienced the processes of shoaling, breaking, reforming, and so on, and most waves break in the plunging form. The processes of wave-induced setup accompanied with wave breaking before and after the reef ridge were also simulated.

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“…A typical permeable structure mostly consisted of rubble-mounted elements. However, permeable objects can be built using several impermeable parts with slots to vary the porosity, which is known as screen-type barriers [7,8]. The classic type of barrier feature is thin, rigid, vertical, perforated, and surface-piercing, which is beneficial to account for economic and environmental concerns.…”

Section: Introductionmentioning

confidence: 99%

“…However, the flow fields of wave interactions with slotted barriers were studied sparsely. Although several numerical studies have provided simulated flow fields around slotted barriers [8,10], flow separation is one of the complicated phenomena in fluid mechanics and may not be able to be resolved accurately using numerical models unless the model has been rigorously validated through detailed model-data comparisons [11]. Using the particle image velocimetry (PIV), Liu and Al-Banaa [12] studied non-breaking solitary waves runup on a vertical surface-piercing barrier, and Wu et al [13] investigated breaking solitary waves over a submerged bottom-mounted barrier.…”

Section: Introductionmentioning

confidence: 99%

Propagation of Solitary Waves over a Submerged Slotted Barrier

Hsiao

2020

JMSE

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In this article, the interaction of solitary waves and a submerged slotted barrier is investigated in which the slotted barrier consists of three impermeable elements and its porosity can be determined by the distance between the two neighboring elements. A new experiment is conducted to measure free surface elevation, velocity, and turbulent kinetic energy. Numerical simulation is performed using a two-dimensional model based on the Reynolds-Averaged Navier-Stokes equations and the non-linear k-ɛ turbulence model. A detailed flow pattern is illustrated by a flow visualization technique. A laboratory observation indicates that flow separations occur at each element of the slotted barrier and the vortex shedding process is then triggered due to the complicated interaction of those induced vortices that further create a complex flow pattern. During the vortex shedding process, seeding particles that are initially accumulated near the seafloor are suspended by an upward jet formed by vortices interacting. Model-data comparisons are carried out to examine the accuracy of the model. Overall model-data comparisons are in satisfactory agreement, but modeled results sometimes fail to predict the positions of the induced vortices. Since the measured data is unique in terms of velocity and turbulence, the dataset can be used for further improvement of numerical modeling.

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Numerical Investigation of Solitary Wave Interaction with Double Row of Vertical Slotted Piles

Cited by 17 publications

References 39 publications

Investigation on innovative pile head breakwater for coastal protection

Investigation on innovative pile head breakwater for coastal protection

Numerical Study of Wave Dynamics over Island Reefs Based on Smoothed Particle Hydrodynamics Method

Propagation of Solitary Waves over a Submerged Slotted Barrier

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