Study on combined numerical model for flow and sediment carrying estuary and its application
A 1 - D and 2 - D combined numerical model is put forward during the numerical calculation of flow and sediment at an esturary. In accordance with the 1 - D and 2 - D dimensional flow continuity equation, the motion equation, the diffusion equation for the suspended sediment, the bed load movement equation for the two-phase flow and the equation for river bed evolution, the three-steps-solving method for river network and the upwind difference scheme are applied to the 1 - D river channel;while the FEM weighted lump-mass method and the triangle difference scheme are applied to the 2 - D coastal area. On the basis of this, a combined numerical model for the flow and sediment carrying estuary is established. During the application of this model to the study on the estuary project of Yongdingxinhe River in Tianjin, the calculated values coincides with the measured ones through the verification based on the measured data of both the flow and the sediment; which provides a feasible method for the study on the problems from the stabilities of the flow and the sediment in the river and the coastal area during the estuary improvement concerned.
1 -D and 2-D combined numerical model for estuarysediment numerical modeltwo-phase flow bed load movement
国家科技期刊平台
NSTL
万方数据
维普
