Abstract
Lagrangian simulation is one of the most effective tools for analyzing the detail mechanism of sediment transport. In the previous Lagrangian simulation, the motion of sediment particle was traced on the fixed bed in which bed material particles were irregularly arranged. While, in this study, bed-material particles are treated as granular material by using Distinct Element Method, or DEM, to describe particle/particle interaction. The velocity profile of the moving particles and the existing-height probability of sediment particle, or sediment concentration, are calculated based on the simulated motion of sediment particles by DEM to consider the physics of particle/particle interaction especially in the neighborhood of bottom movable boundary.
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