Abstract
Interparticle collision plays a very important role in bed-load transport with high concentration. The motion of bed-load particles are traced simultaneously in the numerical simulation of granular assembles. The results of present simulation has clarified that the interparticle collision brings the irregularity to the trajectory of individual saltation, which is the deterministic one depending upon only the initial velocity just after a repulsion at a bed surface. Such a change in the structure of bed-load layer due to the interparticle collision are investigated by comparing the results of the characteristics of the existing probability density and the velocity profile of bed-load particles with those estimated without interparticle collision.
