Floating breakwaters under regular and irregular wave forcing: reflection and transmission characteristics

Koutandos, E. V.; Prinos, P.; Gironella, X.

doi:10.1080/00221686.2005.9641234

Cited by 128 publications

(65 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Under the action of shortperiod wave trains the structure's draught is the main governing design parameter, leading to increased local turbulence and energy dissipation. 1 Under the action of long-period waves where the structure's width tends to be the most important parameter, 1 the hydrodynamic response of the two categories of surface piercing structures (fixed or floating) is different. For floating breakwaters, the conclusions of this study can be used to a certain degree, depending on the degree of mobility that the mooring system allows the structure.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic analysis of a skirt breakwater

Koutandos¹

2007

Proceedings of the Institution of Civil Engineers - Maritime En

View full text Add to dashboard Cite

In the present study, wave interaction with a fixed double partially immersed (skirt) breakwater was investigated numerically and experimentally. The large-scale laboratory experiments concerning the interaction of regular and irregular waves with the breakwater were conducted in the Canal d'Investigació i Experimentació Marítima flume of maritime engineering laboratory at Universitat Politè cnica de Catalunya in Barcelona. The experimental results were compared with numerical results obtained with the use of the Cobras model for the regular waves case. The effects of relative width (structure length/wave length) and the relative distance (distance between two barriers/wave length) on the hydrodynamic characteristics (wave transmission, reflection, dissipation, velocity, turbulence kinetic energy) were investigated. The experimental water surface elevation compared satisfactorily with the computed results. Detailed computed velocities and turbulence kinetic energy in the vicinity of the two structures indicate the effects of the breakwater on the flow pattern and the turbulence structure. NOTATION

show abstract

Section: Introductionmentioning

confidence: 99%

Hydrodynamic analysis of a skirt breakwater

Koutandos¹

2007

Proceedings of the Institution of Civil Engineers - Maritime En

View full text Add to dashboard Cite

show abstract

“…The model was run for 2 different incident angles of 0 and 45 o , and about 18 different wave periods from 3 to 6 sec to find an optimal period. Each floating buoy is assumed to transmit 40% of the energy since the transmissioncoefficient reaches the values of about 0.4 under the forcing of short period waves inintermediate and deep waters (Koutandos et al, 2005). Evans (1976) showed that the maximum efficiency of wave absorption for a rolling vertical cylinder reaches 50% because of the horizontal symmetry about the axis of oscillation.…”

Section: Buoy Arraysmentioning

confidence: 99%

An array effect of wave energy farm buoys

Kweon¹,

Lee²

2012

International Journal of Naval Architecture and Ocean Engineeri

View full text Add to dashboard Cite

show abstract

“…Moreover, they found that by fixing a row of pipes below the floating body, they achieved the same Ct with smaller ratio of structure length to wavelength. Koutandos et al [11] presented an experimental study of waves acting on floating breakwater with four different configurations (single fixed, heave motion free, single fixed with attached front plate and double fixed) in shallow and intermediate waters. It was noted that the effect of the various configurations on the transmission, reflection and energy dissipation coefficients is significant.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the interaction between linear/nonlinear waves and breakwater

Shao¹,

Luo²

2016

Int. J. CMEM

View full text Add to dashboard Cite

Based on the Reynolds-Averaged Navier-Stokes (RANS) equations and the Volume of Fluid (VOF) method, a numerical wave tank, including wave generation, propagation and damping zones, is set up. Nonlinear regular waves of large amplitude are simulated in a vertical two-dimensional (2D) wave flume. The wave generation with the relaxation zone, which damps the reflected waves from structures in the numerical wave flume, is implemented using the momentum source method. The computed wave profiles agree well with the target wave profiles. Interactions between wave and floating semisubmersible box-type breakwater are studied. The relationships between the ratio of breakwater length to wavelength and transmission coefficients are predicted and compared with the analytical solution of linear waves and the experimental data. Results demonstrate that the transmission coefficient is markedly affected by both ratio of breakwater length to wavelength and the water draught. But wave amplitude does not distinctly affect the transmission coefficient for regular waves. For the cases of interaction of a floating breakwater and large amplitude wave, the effects of wave breaking, run-up and overtopping are discussed.

show abstract

Floating breakwaters under regular and irregular wave forcing: reflection and transmission characteristics

Cited by 128 publications

References 12 publications

Hydrodynamic analysis of a skirt breakwater

Hydrodynamic analysis of a skirt breakwater

An array effect of wave energy farm buoys

Numerical investigation of the interaction between linear/nonlinear waves and breakwater

Contact Info

Product

Resources

About