采用两相流混合模型，并选取Realizable k-ε 湍流模型封闭两相流时均方程，对梯型断面明渠淹没丁坝绕流水力特性进行三维数值模拟。速度与压力耦合方程组求解时使用半隐式SIMPLE（Semi-Implicit Method for Pressure-Linked Equations）算法，模拟自由水面采用了VOF（Volume of Fluid）法。通过模拟得到了水面线、流速等水力参数的分布规律。模拟结果与实测资料的对比表明：两者吻合较好，VOF方法和Realizable k-ε 模型的耦合求解能够很好地模拟明渠淹没丁坝绕流的水力特性，为丁坝的设计、布置与施工提供理论基础支持。
英文摘要:
The paper used two-phase gas-liquid model and 3D Realizable k-ε turbulence model to numerically simulate the hydraulic characteristics of flow for submerged spur dike. The SIMPLE（Semi-Implicit Method for Pressure-Linked Equations） algorithm was used for the solution of velocity and pressure. The VOF （Volume of Fluid）method was used to simulate the free surface. The distribution law of hydraulic factors such as water surface profile and flow velocit was obtained by simulation.The comparison of the simulation result with the measured data shows a good agreement. The research indicates that the coupled solution of VOF method and 3D Realizable k-ε turbulence model can well simulate the hydraulic characteristics of flow around submerged spur dike on open channel, which can provide theoretical support for the design, layout and construction of similar spur dikes.