Abstract
In this study, numerical simulation of suspended sediment transport was conducted on the basis of the equation of motion in mass point system. LES turbulence model was introduced to simulate a coherent structure of turbulent shear fow which is composed of a series of ejection and sweep. Several hundred of sediments were traced in such a flow field, and their trajectories were analyzed statistically. Diffusion coefficient of sediment was evaluated numerically on the basis of diffusion theory by G.I. Taylor, and was compared with the value of turbulent diffusion coefficient. As a result, these two coefficients were found to take approximately same value, which coincides with the assumption of traditional analysis.
