Hydrodynamic characteristics of semi-immersed breakwater with an attached porous plate

Koutandos, E. V.; Prinos, P.

doi:10.1016/j.oceaneng.2010.09.002

Cited by 32 publications

(9 citation statements)

References 23 publications

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“…The amount of energy lost at the breakwater is quantified by CL 2 , which is equivalent to E l /E i as shown in equation (3). Some of the mechanisms that lead to energy loss observed during the experiment are include wave breaking, wave runup and run down, formation of eddies underneath the test model, and generation of sound and heat.…”

Section: Energy Lossmentioning

confidence: 99%

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Use of a floating breakwater system as an environmentally friendly method of coastal shelter

Teh

Azizan

Kurian

et al. 2015

WIT Transactions on the Built Environment

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Floating breakwaters are known as environmentally-friendly methods of coastal shelter due to the fact that they pose minimum interruption to water circulation and sediment transport. However, the majority of them are strong wave reflectors, directing wave energy to the seaward and resulting in confusing sea state at the seaward side. This research aimed to quantify the wave transmission, wave reflection and energy loss by the H-type floating breakwater via physical modelling. The performance characteristics of the breakwater were measured by the coefficient of transmission, reflection and energy loss. The coefficients were related to a dimensionless wave parameter and the relative immersion depth of breakwater. The experimental results showed that the H-type floating breakwater is a good anti-reflection structure and an effective energy dissipater. The hydraulic performance of the breakwater was more controlled by the relative breakwater immersion depth than the wave parameter.

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Section: Energy Lossmentioning

confidence: 99%

“…The control of hydraulic performance of the floating breakwater by its geometry has been widely studied by different researchers [2][3][4]. McCartney [5] generally classified the floating breakwaters into four types, i.e.…”

Section: Introductionmentioning

confidence: 99%

Use of a floating breakwater system as an environmentally friendly method of coastal shelter

Teh

Azizan

Kurian

et al. 2015

WIT Transactions on the Built Environment

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“…This model and its improved version called Cornell Breaking Waves and Structures-Universidad Cantabria (COBRAS-UC; Losada et al 11 ) have been widely applied to different types of breakwaters. [12][13][14] In addition, some scholars 15,16 have also studied the interactions between solitary waves and structures.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of solitary wave interaction with wave wall of breakwater using arbitrary Lagrangian–Eulerian method

Wang

Jin

2016

Proceedings of the Institution of Mechanical Engineers, Part M:

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The arbitrary Lagrangian-Eulerian method is used to simulate solitary wave interacting with wave wall of a rubble mound breakwater. The Navier-Stokes equations in arbitrary Lagrangian-Eulerian description are solved using operator splitting technique. The penalty-based coupling method is introduced to analyze the coupling of structure and fluid. A piston-type wave maker generating the incident solitary wave is set up in the computational domain. In order to evaluate the numerical model's performance, a set of experimental studies are carried out in a wave flume using solitary waves at a 1:25 scale. The accuracy of simulation of the solitary wave is verified by comparing with the theoretical value and testing data of the wave surface. Wave transformation, impact and overtopping on the breakwater are simulated in this numerical flume, and the time history of pressure on the wave wall is analyzed. The distributions of maximum impact pressure for solitary waves with different wave heights from the numerical simulations show a good agreement with the experimental results. Based on the dynamic response of the breakwater, the stress distribution and the deformation of the wave wall are discussed. The numerical model can be used as a complementary tool for the design of this kind of structures.

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“…Moreover, by 3 T increasing the angle of incident waves relative to the vertical position, transfer coefficient of the breakwater decreases. Koutandos et al [2] in 2011, following their previous research, examined the hydrodynamic characteristics of floating breakwaters with porous blades in a numerical study. They concluded that by increasing porosity of blades, transfer coefficient increases, as well.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Floating Pontoon Breakwater with ANSYS AQWA Software and Validation of the Results with Laboratory Data

Samaei¹,

Azarsina²,

Ghahferokhi³

2016

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The application of engineering software’s to design and analyze civil infrastructures is increasing. In this regard, computational fluid dynamics software’s used for the examination of the interaction of coastal and marine structures with waves play a unique role in the implementation of marine projects, since the operating costs of sea is significantly higher than that of land. In the present study, two models of floating pontoon breakwaters (i.e. simple pontoon as the first model and step pontoon as the second model) have been simulated with the application of ANSYS AQWA software. The main indicator of breakwater performance is the wave transmission coefficient (i.e. the ratio of the wave height on the back of the breakwater to the wave height entering the coastal zone) which is examined with the consideration of the changes occurring in the physical parameters such as draft, period, and amplitude of waves. The software solves the wave-structure interaction problem with the application of the boundary element method based on Laplace equation and presents water level meter as the output. Finally, the numerical results and the output of the software have been compared with the laboratory results to pursue the verification purpose. Laboratory data were extracted by the same team of researchers at Science and Research branch of Islamic Azad University. Furthermore, the obtained errors and deviations as well as the best possible performance and status of breakwaters at different waves have been specified.

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Hydrodynamic characteristics of semi-immersed breakwater with an attached porous plate

Cited by 32 publications

References 23 publications

Use of a floating breakwater system as an environmentally friendly method of coastal shelter

Use of a floating breakwater system as an environmentally friendly method of coastal shelter

Numerical simulation of solitary wave interaction with wave wall of breakwater using arbitrary Lagrangian–Eulerian method

Numerical Simulation of Floating Pontoon Breakwater with ANSYS AQWA Software and Validation of the Results with Laboratory Data

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