弯道水流的数值模拟及沿河路基冲刷机理分析

Numerical Simulation of Flow in River Bends and Analysis of Subgrade Scour Along River Bend

应用大型流场分析软件Fluent,采用现代三维运动界面追踪技术VOF(流体体积)方法和标准k-ε模型耦合求解对圆心角为90°弯道的弯道水流三维流场进行了合理模拟,得出了河床剪应力的分布特征,为路基冲刷分析和合理防护措施的制定提供了理论分析的基础.

Modern 3D moving interface tracing technology-VOF （volume d fluid） method and standard k-ε model which are integrated in Fluent, are jointly used in the present study to numerically sim- ulate the flow field of river bend. The calculated results are in good agreement with experimental data. The distribution of shear stress is also obtained from the numerical simulation, consequently lays a foundation of the analysis of subgrade scour and establishment of rational preventive measures.