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Many traditional researches on the sediment mixture flow are based on the continuum mechanics, which handled with water and particles as one body. But this method can not describe the particle/particle interaction based on dynamical mechanism of particle motions. This study takes an approach method for considering particles motion and motion of water current individually by using the distinct element method (DEM) coupled with κ-e turbulence model for water-flow. The flow velocity profile and the concentration profile are calculated and compared with the reported experimental results. And the internal structure of the sediment-water mixture flow and the role of momentum transfer have been investigated from the present numerical model.

NUMERICAL SIMULATION ON A FULLY DEVELOPED SEDIMENT- MIXTURE FLOWS BY USING A DEM-FLOW COUPLING MODEL