Scouring study of pile foundation perforated breakwater under regular wave action

Based on the FLOW-3D software, scour simulation experiments were conducted under the conditions of 3 sets of wave heights, 3 sets of wave periods, and 5 types of baffle forms. The study analyzed the changes in the flow field around the breakwater structure and the changes in seabed scouring topography under different working conditions. The results indicate that under the action of regular waves, the variation in wave height has a minor impact on the changes in the flow field around the breakwater structure and the changes in seabed scouring topography. In contrast, the wave period is positively correlated with the efficiency of sediment scour around the breakwater structure, having a more significant impact. Different wave periods lead to different patterns in the changes in seabed scouring topography due to the way the baffles are opened. When the wave period is 1.5 s, with the increase of the baffle open rate and the enlargement of the area at the bottom of the baffle, the area and volume of the scour pit gradually decrease, displaying a linear distribution; when the wave period is 2.0 and 2.5 s, the area and volume of scouring show a quadratic curve distribution.