Numerical investigation of the interaction between an inverse T-type fixed/floating breakwater and regular/irregular waves

Jin, Zuanming; Chen, Xuebin; Gong, Ye-jun; Hu, Wenqing

doi:10.1016/j.oceaneng.2017.03.058

Cited by 44 publications

(10 citation statements)

References 24 publications

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“…Based on wave climate off China's shore and building cost, they suggested that the cylinder diameter must be twice the incident wave height in order to obtain the best energy harvest efficiency. Zhan et al (2017) applied zonal hybrid Reynolds averaged Navier-Stokes (RANS)/laminar method with a new meshing strategy to investigate hydrodynamic performance of an inverse T-type breakwater. They investigated heave and pitch transfer functions as well as transmission and reflection coefficients for floating and fixed breakwaters in regular and irregular waves.…”

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confidence: 99%

Diffraction waves on large aspect ratio rectangular submerged breakwaters

Masoudi

Gan

2020

Ocean Engineering

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confidence: 99%

Diffraction waves on large aspect ratio rectangular submerged breakwaters

Masoudi

Gan

2020

Ocean Engineering

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“…The fluid motion is governed by the Navier-Stokes equations composed of the continuity equation and the momentum equation. In the δ-SPH framework, they can be discretized, respectively, as [82,83] [5]; (e) Pontoon with an air chamber [6]; (f) Pontoon with two air chambers [7]; (g) Permeable structure [8]; (h) Y-Type pontoon [9]; (i) Trapezoidal pontoon-porous plates [10]; (j) Horizontal plate-nets [11]; (k) Dual cuboid pontoon [12]; (l) Dual cylindrical pontoon [13]; (m) Dual cylindrical pontoon-nets [14]; (n) Triple cuboid pontoons [15]; (o) Double-row cuboid pontoons [16]; (p) Double-row cuboid pontoons-mesh cage [17]; (q) Double-row cylindrical pontoons-mesh cage [18]; (r) F-type pontoon [19]; (s) Trapezoidal porous pontoons [20]; (t) T-type pontoon [24]; (u) Curtain wall [69]; (v) Pontoon with different cross-sections [73].…”

Section: Fluid Equationsmentioning

confidence: 99%

“…Qu et al [23] applied the FDM-based open-source code REEF3D to investigate the sheltering effects of a floating breakwater on a bridge deck subjected to cnoidal waves. Zhan et al [24] used the commercial software FLUENT, which is based on the finite volume method (FVM), to model the interaction between regular/irregular waves and T-type fixed and floating breakwaters (Figure 1t), respectively. Another FVM-based software, Star-CCM+, was utilized by Zhang et al [25] to examine the hydrodynamic performance of a wave energy converter-type floating breakwater under regular waves.…”

Section: Introductionmentioning

confidence: 99%

“…Most recently, Cui et al [74] compiled the open-source mooring analysis program MAP++ [75] into the SPH code to predict the hydrodynamic performance of a multi-module floating breakwater. [5]; (e) Pontoon with an air chamber [6]; (f) Pontoon with two air chambers [7]; (g) Permeable structure [8]; (h) Y-Type pontoon [9]; (i) Trapezoidal pontoon-porous plates [10]; (j) Horizontal plate-nets [11]; (k) Dual cuboid pontoon [12]; (l) Dual cylindrical pontoon [13]; (m) Dual cylindrical pontoon-nets [14]; (n) Triple cuboid pontoons [15]; (o) Double-row cuboid pontoons [16]; (p) Double-row cuboid pontoons-mesh cage [17]; (q) Double-row cylindrical pontoons-mesh cage [18]; (r) F-type pontoon [19]; (s) Trapezoidal porous pontoons [20]; (t) T-type pontoon [24];…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study on the Hydrodynamic Characteristics of a Double-Row Floating Breakwater Composed of a Pontoon and an Airbag

Cheng

Liu

Zhang

et al. 2021

JMSE

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By adding a cylindrical airbag on the leeward side of a cuboid pontoon, a new-type double-row floating breakwater is designed to improve the wave attenuation performance, and its hydrodynamic characteristics are studied through numerical simulations. First, based on the smoothed particle hydrodynamics (SPH) method, a numerical model used to simulate the interaction between waves and moored floating bodies is built. The fluid motion is governed by the Navier–Stokes equations. The motion of the floating body is computed according to Newton’s second law. The modified dynamic boundary condition is employed to treat the solid boundary. The lumped-mass method is adopted to implement the mooring system. Then, two physical model experiments on waves interaction with cuboid and dual cylindrical floating pontoons are reproduced. By comparing the experimental and numerical wave transmission coefficients, wave reflection coefficients, response amplitude operators and mooring force, the reliability of the numerical model is validated. Finally, the validated numerical model is applied to study the influence of separation distance and wave parameters on the hydrodynamic characteristics of the double-row floating breakwater. The results indicate that the optimal separation distance between pontoon and airbag is 0.75 times the wavelength. At such separation distance and within the concerned 1–4 m wave heights and 4–7 s wave periods, the pontoon-airbag system presents better wave attenuation performance than a single pontoon. This improvement weakens as wave height increases while it strengthens as the wave period increases. In addition, the double-row floating breakwater is more effective in a high-wave regime than in a low-wave regime. In the case of short waves, attention should be paid to the stability and mooring reliability of the seaward pontoon, while in the case of long waves, care needs to be taken of the leeward airbag.

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“…They showed that the winged FB has larger reflection and dissipation coefficients than the non-winged one, showing a great improvement for box-type FBs. Masoudi (2019) Previously in studies such as Gesraha (2006), Günaydın and Kabdaşlı (2007), Zhan et al (2017) and Masoudi (2019), two types of rectangular FBs, so called the Π type and the inverse T type, were studied using numerical or analytical methods. In fact, these FBs could be characterized by a more general two-legged FB configuration, which is equipped with two external legs that could be made by adding simple columns of steel to conventional rectangular cross section breakwaters.…”

Section: Introductionmentioning

confidence: 99%