抄録
Flow/particle and particle/particle interaction are key-factors to investigate internal structure of the bed load layer from the viewpoint of computational mechanics of sediment transport. In addition, interaction between bed load layer and fluctuating free water surface is also key-factor under high bottom shear condition. In this paper, the particle/ particle interaction was evaluated by the Distinct Element Method (DEM), the flow/particle interaction was evaluated by drag force and the free water surface was traced by the Lagrangian massless marker particles. Developing process of the bed load layer was simulated by the Euler-Lagrange coupling model, furthermore, the internal structure of the bed load layer was discussed by the velocity profile, ineter-particle force and so on.
