SPH Modeling of Heave Motion Response of Pile-Supported Floating Breakwater

Document Type : Original Article


Amirkabir University of Technology


The interaction of sea waves and floating bodies is one of the pioneering fields of study in marine technology that has recently received a lot of attention. Floating breakwater can be an alternative for conventional breakwaters in anomalous conditions such as deep water, insufficient seabed and high sedimentation rates in typical wave climates where there is no need for full protection.In this article, the heave motion response of a single degree of freedom pile-supported floating breakwater was investigated employing WCSPH technique. To describe the momentum equation, the laminar viscous stress model, and to surmount the spurious pressure oscillation of the numerical technique, the Shepard density filter was employed. In addition, three different weighting functions including Gaussian, Cubic Spline and Quintic (Wendland) were compared to select the most appropriate one for modeling. The results showed that the Cubic Spline and Quintic weighting functions were more appropriate in navigating a solution for the problems with this kind of wave structure interaction. The velocity field near the FB showed that the maximum velocity of water particles occurred near the sharp edges of the body.