Particle Motion Characteristic as Bed Material Load and Its Effect on the Turbulent Structure of Water Flow

Key Points

• This research aims to examine the relationship between bed material load and its effects on turbulent water flow structures.
• Conducted experiments using PIV (Particle Image Velocimetry) technique to analyze particle motion.
• Evaluated the velocity and concentration of particles as bed material load in water flow.
• Investigated the probability density distribution of particle velocities and their relationship with fluid resistance.
• Particle velocity distribution follows a gamma distribution, varying by height from the riverbed.
• Increased bed material load leads to higher water flow resistance and reduced average flow velocity.
• Turbulence intensity and Reynolds stress both decrease as bed material load increases.