Turbulent Structure in Sediment Flows of Single Sized Particle With Different Concentrations Analyzed by Three-Dimensional Numerical Simulations of Coupled Solid and Fluid Motions

Key Points

• This research aims to analyze the turbulent structure of sediment flows using three-dimensional numerical simulations of solid and fluid interactions.
• Conducted three-dimensional numerical simulations of sediment flows under varying gradient scenarios.
• Analyzed flow structures of both sediment-laden flows and pure water.
• Examined the relative strength of turbulence intensities at various heights and concentrations.
• High-concentration sediment flows show stronger downward turbulence near the surface compared to low-concentration flows.
• At the bottom of flows, turbulence tends to be more isotropic in high-concentration scenarios.
• Energy spectrum analysis indicates that higher particle concentrations in the flow lead to weaker drops in energy spectrum on the high-frequency side at the flow bottom.