Abstract
The particle/particle interaction is the key to investigate the sediment transport phenomena from the viewpoint of the computational mechanics. In this paper, the mechanism of graded sediment sheetflow are described experimetally and numerically under the oscillatory flow. Simulation model is the combined distinct elemet method (DEM) with k-ε turbulence model. The mechanism of the vertical sorting and resultant armoring have been investigated from the velocity profile, the concentration profile, snap shots of particles and so on. A comparison of experiments with numerial results shows good agreement.
