Water Wave Interaction by Dual Cylindrical Cylinders with Partial Porous Area

Park, Minsu; Jeong, Youn-Ju; You, Young‐Jun

doi:10.7763/ijet.2017.v9.952

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…In order to consider the scattering between the cages, Graf's addition theorem has been employed. This theorem forms the basis of modeling the wave scattering from multiple floating structures (Kagemoto and Yue, 1986;Park et al, 2012Park et al, , 2017Zheng et al, 2020c;Zheng et al, 2020a). Quantities like power dissipation, the reflected and transmitted wave amplitudes at the far-field are analyzed in the present study to investigate the use of multiple fishing cages as a breakwater.…”

Section: Introductionmentioning

confidence: 99%

Surface wave scattering by multiple flexible fishing cage system

et al. 2021

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A study of the wave dynamics around a multiple cylindrical fishing cage system is carried out under the assumption of linear water wave theory and small-amplitude wave response. The Fourier-Bessel series expansion of the velocity potential is derived for the regions enclosed under the open-water and cage systems and the immediate vicinity. The scattering between the cages is accounted for by employing Graf's addition theorem. The porous flexible cage system is modeled using Darcy's law and the three-dimensional membrane equation. The edges of the cages are moored along their circumferences to balance its position. The unknown coefficients in the potentials are obtained by employing the matched eigenfunction method. In addition, the far-field scattering coefficients for the entire system are obtained by expanding the Bessel and Hankel functions in the plane wave representation form. Numerical results for the hydrodynamic forces, scattering coefficients, and power dissipation are investigated for various cage and wave parameters. The time simulation for the wave scattering from the cage system is investigated. The study reveals that wave loading on the cage system can be significantly reduced by the appropriate spatial arrangement, membrane tension, and porous-effect parameter. Moreover, the far-field results suggest that the cage system can also be used as a breakwater.

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Section: Introductionmentioning

confidence: 99%

Surface wave scattering by multiple flexible fishing cage system

et al. 2021

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“…The wave interaction with a group of dual porous cylinders consisting of an outer porous cylinder that protects an impermeable inner cylinder is investigated using the eigenfunction expansion approach by Sankarbabu et al [16]. Using the 3D numerical analysis method and eigenfunction expansion method, Park et al [17] evaluated the wave forces acting on the array of dual cylindrical cylinders with partial porous area, which consist of an impermeable inner cylinder and a porous outer cylinder. Dokken et al [18,19]performed a mathematical analysis of the linear wave diffraction-radiation problem of a porous geometry localized in the surface of a inviscid fluid.…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution for Wave Diffraction by a Concentric Three-Cylinder System near a Vertical Wall

Zhai

Xia

et al. 2021

Mathematics

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In this study, a semi-analytical model was developed to study wave diffraction around a concentric three-cylinder system near a wall based on linear potential theory. As a critical element, the target problem is transformed into bidirectional incident wave diffraction around two concentric structures based on the image principle and an analytical solution is obtained through eigenfunction expansion combined with a matching technique and Graf’s addition theorem. The validity of the proposed model was verified by comparing its results to known values. Parametric studies on porosity, annular spacing, incident angle, space between the structure and wall, and water depth were performed. The hydrodynamic loads and free-surface elevations in the system were calculated and compared to those reported in existing works on impermeable and permeable cylinders near a wall. The results indicate that the wave loads and run-ups on the exterior cylinder increase significantly based on the existence of the wall. However, based on the presence of an exterior porous protective structure, a significantly reduced influence of the wall on the interior cylinder can be observed. Considering the widespread use of concentric circular structures in ocean engineering, it is essential to conduct study on the hydrodynamic performance of concentric systems near walls, which can provide useful information for the design of marine structures.

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Hydrodynamic forces and moments due to interaction of linear water waves with truncated partial-porous cylinders in finite depth

Sarkar

Bora

2020

Journal of Fluids and Structures

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Water Wave Interaction by Dual Cylindrical Cylinders with Partial Porous Area

Cited by 6 publications

References 16 publications

Surface wave scattering by multiple flexible fishing cage system

Surface wave scattering by multiple flexible fishing cage system

Analytical Solution for Wave Diffraction by a Concentric Three-Cylinder System near a Vertical Wall

Hydrodynamic forces and moments due to interaction of linear water waves with truncated partial-porous cylinders in finite depth

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