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Wave Control by an Array of Porous Dual Cylindrical Structures  

CHO IL-HYOUNG (제주대학교 해양산업공학부)
Publication Information
Journal of Ocean Engineering and Technology / v.18, no.5, 2004 , pp. 7-14 More about this Journal
Abstract
The interaction of incident manochromatic waves with an array of N surface-piercing porous dual cylindrical structures is investigated in the frame of three-dimensional linear potential theory. The dual cylindrical structure is camposed of concentric two cylinders. The exterior cylinder is porous and the interior cylinder is impermeable. The fluid domain is divided into N+1 regions i.e. a single exterior region and N interior regions. The diffraction potentials in each region representing the scattering of incident waves by an array of porous cylindrical structures are expressed by the Fourier Bessel series. The unknown coefficients in each region are determined by applying the porous boundary condition and continuity of mass flux at the matching boundary. It is found that an array of porous cylindrical structures reduces both the wave forces and the wave run-up, and shows the excellent performance of wave blocking. The results show that various types of breakwater exchanging seawater are prospective by controlling the porosity and the configuration of cylindrical structures.
Keywords
Porous Cylindrical Structure; Wave Control; Seawater Exchanging Breakwater; Eigenfunction Expansion Method; Porous Coefficient; Wave Run-up;
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Times Cited By KSCI : 1  (Citation Analysis)
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