Simulation of sediment incipience around the vibrating monopile

• DOI: 10.48550/arxiv.2312.05926
• Publication Date: 2023-01-01
• Authors: Shi, Yuxuan; Cheng, Yongzhou
• Keywords: Fluid Dynamics (physics.flu-dyn); FOS: Physical sciences; Physics - Fluid Dynamics

Based on the fluid volume fraction large eddy simulation discrete phase coupling model, the water and sediment flow around the vibrating monopile was simulated. The discrete phase momentum model was enhanced using the force distribution of the particle phase on the bed surface. Additionally, the flow dynamics and sediment incipience around a vibrating monopile was replicated through the use of a sediment incipience Shields number. The results suggest that monopile vibrations amplify the negative incipience of sediment in both the front deceleration region and the wake reflux region. Furthermore, within the periodic flow field surrounding the monopile, the temporal changes in the sediment incipience Shields number does not consistently match the temporal changes in the spatial average velocity.