Author(s)

KOTTALA PANDURANGA, SANTANU KOLEY

Abstract

This paper presents the effectiveness of partially immersed slotted screens placed at a finite distance away from the floating porous breakwater to mitigate the wave-induced hydrodynamic forces on the floating breakwater. The fluid motion within the porous structure is analyzed using the Sollitt and Cross model. Further, a non-linear pressure drop condition on the slotted screens is considered, which includes the effects of wave height on the incident wave energy dissipation by the slotted screens. In the presence of the non-linear boundary condition on the slotted screen, the associated boundary value problem is solved numerically using the iterative multi-domain boundary element method. Various physical interests of the study, such as reflection coefficient, transmission coefficient, wave energy dissipation coefficient, and wave forces acting on the slotted screens and floating breakwater, are analyzed in detail for various wave and structural parameters. The results show that the maximum wave-induced forces acting on the porous breakwater are observed when the gap between the slotted screen and porous breakwater is approximately equal to an integer multiple of half of the wavelength for different porosities of the slotted screens.

Keywords

slotted screens, wave-induced forces, iterative multi-domain boundary element method, reflection coefficient