Study On3D Numerical Simulation For Water-sediment Two-phase Flow In Typical Curve Bend

Head sluice connected with the curve bend where the sediment can be separated from the flow byitself is well known as a qualified system for decreasing sediment concentration in the water. And theevaluation standard for curve bend’s design is the form of sedimentation in the bend. In this paper, both theexperimental study on physical model and numerical simulation on numerical models have been carried outfor the send-water two-phrase flow in typical curve bend. The conclusions of the study are as follows:(1) After experiments on the physical model with different rate of flow, the water surface profile andvelocity distribution in the flow field for pure water have been tested. And the sedimentation form atseveral typical sections in the curve trend where sedimentation get equilibrium between scouring anddeposition on the shifting bed have been measured for flow analyzation.(2)A3D turbulence model for sand-water two-phrase flow in the typical curve trend has been builtbased on RNG k-ε turbulence model in FLUENT after compared with several other modelscomprehensively. The results of the numerical simulation agree well with the experimental results.(3)The numerical results show that the3D turbulence model can simulate sand-water two-phrase flowin the typical curve trend very well, and the numerical model can also provide instructions for the physicalexperiment optimization in the typical curve trend..