溢流堰水流的三维模拟

Three-dimensional simulation of flow over weirs

工程上溢流堰的过流能力以及堰面压强分布的确定多采用水工模型试验.利用三维的流动数学模型、k-ε模型封闭紊流、VOF方法追踪自由表面,对过堰流动进行了数值模拟.与模型试验结果对比表明,数值模拟方法是可行的.

In engineering practices, the hydraulic model test is the common way to determine overflow capacity of a weir and pressure distribution on the weir. In this paper, numerical simulation is conducted to analyze the flow over weirs. The numerical analysis is based on the three-dimensional Reynolds averaged Navier-Stokes equations with the standard κ-ε turbulence model. To track free surface, the VOF method is applied. The comparison with experiments shows that the numerical simulation approaches are feasible.