2025 Volume 81 Issue 16 Article ID: 24-16128
Erosion experiments were performed on a cohesive beds, and three-dimensional numerical simulations were performed on investigate the experimental flow field. The simulation results successfully reproduced the water surface profiles observed in the experiments. Based on these simulation results, the energy acting on the cohesive bed was estimated, and the energy expended for both the characteristic surface erosion and mass erosion on cohesive beds was examined. The energy distribution analysis revealed that the energy is concentrated to the extent of the irregularities scale in the areas where mass erosion occurred, leading enhanced erosion. Furthermore, it was demostrated that for the same erosion depth, the energy expended for mass erosion was smaller compared to the energy expended for surface erosion sections, indicating that mass erosion progressed with less energy.
