为了研究河流海岸工程中悬移质泥沙运动,建立了两相流紊流的数值模型。考虑相间相对运动的影响,水相和颗粒相通过相间作用力进行耦合,雷诺方程采用κ-ε-Ap紊流模型封闭。基于有限体积法的思想,利用具有三阶精度的QUICK格式对流项处理,采用TDMA迭代方法离散方程组求解。应用该模型,计算了明渠恒定均匀流动中泥沙的垂直浓度分布。计算结果与Coleman的实验结果吻合很好,且比经典的Rouse公式更加符合实际情况。 In order to study the suspended sediment movement in the river coast project, a numerical model of two-phase flow turbulence was established. Considering the influence of relative motion between phases, the water phase and the particle phase are coupled by the interphase force, and the Reynolds equation is closed by κ-ε-Ap turbulence model. Based on the idea of ​​finite volume method, QUICK format convection term processing with third-order precision is adopted, and TDMA iterative method is used to solve the discrete equations. Using this model, the vertical distribution of sediment concentration in a constant uniform flow in a open channel was calculated. The calculated results are in good agreement with Coleman’s experimental results and are more realistic than the classical Rouse formula.