LAUSR

Abstract This study investigates the interaction between solitary wave and submerged breakwater based on smoothed particle hydrodynamics. The Goring wave making method is applied. The interactions between a solitary wave and a submerged breakwater with rectangular and semi-circular section are investigated to verify the ability of the presented numerical model. A composite submerged breakwater is proposed by combining a quarter circle and a square. The different arrangements of submerged breakwater are defined as Profile Type I (PT-I) and Profile Type II (PT-II). The forces of the semi-circular of these two submerged breakwaters are calculated and compared. In order to evaluate the wave dissipation effect of these two types of breakwaters, we propose an empirical formula of incident wave energy and a novel concept of an energy transmission coefficient. It is shown that potential energy is transmitted more easily through a submerged breakwater than kinetic energy. The results reveal that the different arrangements of PT-I and PT-II have no obvious effect on wave dissipation, whereas the depth of the submerged breakwater has a significant influence.