非粘性悬沙垂向浓度分布的数值模拟及水槽试验

Numerical Solution and Flume Experiment of Vertical Concentration Distribution of Suspended Non-cohesive Sediment

本文应用Ｋ─ε紊流模型，通过对悬沙运动扩散方程的数值求解，建立了计算悬沙浓度沿水深分布的数学模型。该模型未对扩散方程本身作任何简化，并采用速度场和浓度场耦合求解，因此精度较高。该模型应用方便，其结果与实验值吻合较好，是一种研究河流非粘性泥沙垂向浓度分布的新的尝试。

In this paper, the diffusion equation of suspended sediment is solved by means of K-ε turbulent model, and a new mathematical model about the vertical concentration distribution of suspended sediment is carried out. The concentration fields are solved coupling with velocity fields in this model. It can be seen from this paper that the numerical results agree with the flume experimental data finely. This is a new attempt to study the concentration distribution of suspended no-cohesive sediment in the river.