Wave Attenuation by Multiple Outer Porous Barriers in the Presence of an Inner Rigid Cylinder

Behera, Harekrushna; Gayathri, R.; Selvan, Siluvai Antony

doi:10.1061/(asce)ww.1943-5460.0000534

Cited by 21 publications

(4 citation statements)

References 33 publications

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“…Sarkar and Bora (2019;2020) found that the porous medium located at the lower part of the cylinder also leads to the reduction of the wave loads on the cylinder. Liu et al (2018) and Behera et al (2020) analyzed the effect of the multiple porous barriers on the wave loads on the inner cylinder.…”

Section: Introductionmentioning

confidence: 99%

Wave scattering by a vertical cylinder with a submerged porous plate: Further analysis

Zhao

Geng

et al. 2022

Ocean Engineering

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Section: Introductionmentioning

confidence: 99%

Wave scattering by a vertical cylinder with a submerged porous plate: Further analysis

Zhao

Geng

et al. 2022

Ocean Engineering

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“…Sarkar and Bora (2019a) investigated the wave interaction with the surface-piercing bottommounted porous cylinder, where the resonance effect was observed at a particular wavenumber in the presence of porosity. Later, Behera et al (2020) studied the influence of a truncated concentric porous cylinder on the inner rigid platform, where the optimum number of porous structures for damping the wave amplitude was estimated. Recently, the cnoidal wave diffraction from the dual concentric cylinders in the presence of an arc-shaped outer cylinder was analyzed by Zhai et al (2020).…”

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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“…Since flexibility and porosity of a cylindrical cage play a vital role to create a calm region inside the cage by dissipating wave energy (Yu and Chwang, 35 Williams and Li, 36 Mandal and Sahoo 37 and Mandal and Sahoo 38 ), these cylindrical porous structures can be used as a protective structure to reduce the wave force on the inner circular structure. Recently, the mitigation of wave load on the inner rigid cylinder by multiple outer permeable barriers was investigated by Behera et al 39 Although significant works have been devoted to study the effect of various vertical/horizontal protective structures for reducing wave load on a floating platform, limited emphasis have been focused on the role of cylindrical cage for the mitigation of wave force on the circular floating elastic platform. The impact of a flexible permeable cylindrical membrane is analyzed in the present work for the mitigation of wave load on a inner circular elastic plate.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mitigation of wave force on a circular flexible plate by a surface-piercing flexible porous barrier

Gayathri

Behera

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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Wave force acting on a circular flexible plate in the presence of a vertical surface-piercing flexible porous membrane is examined under the hypothesis of linear water wave theory. A semi-analytic solution is developed employing the Fourier-Bessel series expansion method along with the methods of separation of variables and least-squares approximation. To keep the outer flexible membrane at a desired position, clamped-moored condition is used. Appropriate orthogonal mode-coupling relationship for the eigenfunctions of the plate covered region is exploited in the expansion formulas together with the continuity of velocity and pressure for achieving the system of equations and to determine the unknowns. The effects of various physical parameters are analyzed by computing wave load on the structures, plate deflection and flow distribution. It is found that due to the presence of vertical flexible porous membrane, a significant amount of wave force on the plate is reduced. Thus, a cylindrical flexible porous membrane can be implemented to protect the inner circular flexible plate.

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Wave Attenuation by Multiple Outer Porous Barriers in the Presence of an Inner Rigid Cylinder

Cited by 21 publications

References 33 publications

Wave scattering by a vertical cylinder with a submerged porous plate: Further analysis

Wave scattering by a vertical cylinder with a submerged porous plate: Further analysis

Surface wave scattering by multiple flexible fishing cage system

Mitigation of wave force on a circular flexible plate by a surface-piercing flexible porous barrier

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