Particle–turbulence interaction and local particle concentration in sediment-laden open-channel flows

The present study describes an experimental investigation on the effects of ejection and sweep motions to the local sediment concentration and turbulence modulation in suspended sediment-laden open-channel flows by using a combination between a discriminator particle tracking velocimetry (D-PTV) for sediment particles and a discriminator particle image velocimetry (D-PIV) for fluid tracers. Fluid tracers and sediment particles were discriminated by their occupied particle sizes, and the particle velocity and the fluid velocity were determined simultaneously.