Department of Environmental Engineering, Chungju National University, Chungju 380-702, Korea.
Water Sci Technol. 2010;62(10):2381-8. doi: 10.2166/wst.2010.480.
The best management practices (BMPs) for control of urban stormwater pollution are evaluated to remove solid particles containing various pollutants. Currently, most storm runoff treatment devices using primary pollutant removal mechanism are applied to storm water since most pollutants in runoff are associated with the solid particulates. A hydrodynamic separator is a storm water treatment device using centrifugal motion which separates solids pollution from runoff. In this study, the velocity flow field and particle tracking of hydrodynamic separator were investigated using anthracite as a computational fluid dynamics (CFD) model particle. The Fluent 6.3.26 CFD program was used to predict the solid particles removal efficiency for various parameters such as particle size, surface loading rate, and the ratio of underflow to overflow. The velocity flow field in a hydrodynamic stormwater separator (HDS) has been simulated using CFD RNG κ-ε model. Modeling results for the removal efficiency of HDS were similar with the results obtained from experimental measurements of laboratory scale HDS. These results showed that the simulated velocity field was useful to interpret the behavior of flow in the hydrodynamic separator. The results obtained from particle tracking can be applied to predict the separation efficiency.
为了去除含有各种污染物的固体颗粒，评估了控制城市雨水污染的最佳管理措施（BMP）。目前，大多数使用初级污染物去除机制的雨水径流处理设备都应用于雨水，因为径流中的大多数污染物都与固体颗粒有关。水力分离器是一种利用离心运动将固体污染与径流分离的雨水处理设备。在这项研究中，使用无烟煤作为计算流体动力学（CFD）模型颗粒，研究了水力分离器的速度流场和颗粒跟踪。使用 Fluent 6.3.26 CFD 程序预测了各种参数（如颗粒尺寸、表面负荷率和底流与溢流比）下的固体颗粒去除效率。使用 CFD RNG κ-ε 模型模拟了水力雨水分离器（HDS）中的速度流场。HDS 的去除效率的建模结果与实验室规模 HDS 的实验测量结果相似。这些结果表明，模拟的速度场有助于解释水力分离器中的流动行为。从颗粒跟踪中获得的结果可用于预测分离效率。
