Abstract
Sediment transport in sheet-flow mode is simulated by DEM (distinct element method) with special reference to the momentum transfer due to the interparticle collision. The mean-velocity profile and the root-mean-square value of the velocity variation of sediment particles are calculated through a statistical operation of the simulated motion of sediment particles. The important role of interparticle collision in the momentum transfer in sheet flow is clarified by observing the typical snapshot of the motion of particles and the trajectories of particles. Furthermore, the sediment transport rate in oscillatory flow is predicted by using the result of the simulation; and the formula of the sediment transport rate is proposed as the approximation of the results of the simulation.
