Wave Transmisson Study Through Two Row Piled Breakwaters

Bilici, Cagdas; Ergin, Ayşen; Tarakcıoǧlu, Gülizar Özyurt

doi:10.9753/icce.v34.posters.18

Cited by 2 publications

(2 citation statements)

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“…The analysis of the results is carried out with reference to the trend lines drawn. The scattering of the data points is also witnessed in the literature for the pile breakwater and pile-supported breakwaters by Bilici, 55 Kondo and Toma, 56 Ning et al, 57 Rao et al 27 and Sundar and Subbarao. 11…”

Section: Resultsmentioning

confidence: 54%

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: Resultsmentioning

confidence: 54%

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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“…Breakwaters are evaluated in terms of stability and energy dissipation capability in order to maintain their viability and comprehend their behavior when interacting with nature. In the current work, the energy dissipation capacity of breakwater is evaluated for various shapes using an experimental and numerical model [1].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Energy Dissipation for Different Breakwater Based on Computational Fluid Dynamic Model

Uday A. Alturfi,

Abdul-Hassan K. Shukur

2023

CFDL

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In this research, the hydraulic performance of the combined shape breakwaters was investigated through a laboratory study supported by a numerical mathematical model CFD to examine the different model shapes depending on the transmissions wave coefficient Ct. In order to stabilize the incident wave Hi with the same characteristics, waves were defined through the UDF file for CFD model. To investigated the performance of breakwaters base on energy dissipations, different models were tested under various wave condition, water depth, and relative submerged depth. Result of this study are showed that the Transmission coefficient are increased with increased of incident wave high for all type of breakwater model, and for all models of breakwater, transmission wave height (Ht) are increased with increased relative submerged depth (Hs/Hi). The highest value for energy dissipations (1 - Ct) % are received for zero submerged depth in model of sloped steps model (M2) is 80 %. Ansys Fluent solver are adopted to modelling the transit flow condition with dynamic mesh to represent the flap motion type to generate wave. Numerical beach plays an important role in CFD model to prevent the reflection wave in lee side of breakwater and represent the absorbing shoreline. 240 grid per wave length are selected for Mesh independent solution and make acceptable result comparison with experimental.

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Wave Transmisson Study Through Two Row Piled Breakwaters

Cited by 2 publications

References 0 publications

Investigation on innovative pile head breakwater for coastal protection

Investigation on innovative pile head breakwater for coastal protection

Investigation of Energy Dissipation for Different Breakwater Based on Computational Fluid Dynamic Model

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