Wave Interaction with Vertical Slotted Breakwaters

Abstract

This study aims to introduce two types of an innovate breakwater with an economic feasibility. The first type consists of two vertical perforated walls, the first wall is permeable in lower (porosity =50%) and the upper part is impermeable. And second wall is permeable in upper (porosity =50%) and the lower part is impermeable. between them horizontal slotted wall. the second type is the same construction as on the first type but without horizontal slotted wall. The results indicate that the hydrodynamic performance of the first type is better than that of the second type in the percentage (10-15%) because of the presence of the horizontal slotted wall. The effect of wave force on the first model is bigger than the second model in the range (10-15%). The wave force on the proposed models increases with increasing the relative length (h/L).The transmission coefficient (kt) decreases with increasing the relative length (h/L).The reflection coefficient (kr) increases with increasing the relative length (h/L).from FLOW-3D results able to find values velocity front and behind barriers.