Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 25, 2023 - October 27, 2023
Coastal erosion has long been occurring in Japan. Wave dissipating blocks have been installed on many beaches as a countermeasure against beach erosion, and a variety of shapes exist. In this study, the effect of different shapes on the flow around the blocks was analyzed numerically using the SPH method, and the reaction force on the wall surface after passing through a group of blocks was compared for each block shape to evaluate the wave dissipation effect. As a result, it was confirmed that the hexapod blocks were highly effective in dissipating waves. In addition, a coupled SPH-DEM analysis was performed to account for sandy soil. The validity of the coupled model was confirmed based on the experimental paper, and it was confirmed that the hexapod blocks had the highest wave dissipation effect in both the SPH method analysis and the coupled analysis, but the dissipation effect of the hexapod blocks was more enhanced in the coupled analysis that considered the sandy substrate.
