Evaluation of Sinusoidal Wave Energy Dissipation over a Gyroid Triply Periodic Minimal Surface-based Porous Breakwater

Abstract Breakwaters with porosity have been considered one of the most prospective keys to the wave’s energy reduction issues in the shoreline engineering area. In this project, the specimen test would be a permeable porous breakwater design relied on the structural Triply Periodic Minimal Surface (TPMS) unit cells-Gyroid. The paper’s primary purpose is to utilize the numerical method Finite Volume Method (FVM) to evaluate approximately the wave’s dissipation before and after crashing against the structures. To be detailed, the experiment has two stages: validation and verification. For the first stage, to validate the accuracy of the mathematical sinusoidal wave model, a computational fluid dynamics software (CFD) Ansys Fluent was utilized to approximate the wave’s characteristics and compared with the empirical experiment, which is generated by a plunger-type wavemaker controlled with three different rounds per minute(RPM), separately 22(r/min), 44(r/min) and 66(r/min) in a wave flume without the breakwater. The wave’s characteristics, such as period T , wave height H , and wavelength L , would be considered in this process. Next, those set-ups are reapplied for a numerical wave tank containing the Gyroid breakwater to evaluate the effective performance regarding the wave prevention proficiency, based on the transmission coefficient ( C t ). In conclusion, the proposed wave model is validated, and there is a strong agreement between the numerical and experimental results. Finally, the Gyroid breakwater has exhibited outstanding efficacy in wave transmission reduction.