东南大学学报（英文版）2020，Vol.36Issue(2)：198-205,8.DOI:10.3969/j.issn.1003-7985.2020.02.010
基于计算流体力学的地表径流与地下管流的交互分析
Analysis of interaction between surface and sewer pipe system based on computational fluid dynamics
摘要
Abstract
To verify the accuracy of weir and orifice formula and analyze the hydraulic characteristics of exchange flow in a manhole,a three-dimensional numerical model was proposed to assess the exchange flow rate between the surface and sewer pipe systems based on the real-world scale model.The hydrodynamic model is based on the three-dimensional NavierStokes equations including the standard k-ε model for turbulence processes,and the volume of fluid (VOF) method for capturing the free surface.The results of the computational fluid dynamics (CFD) simulation are compared with the conventional overflow equations,showing that the weir and orifice formula is appropriate to determine the exchange flow rate between two systems in this specific study case.Streamlines and velocity contours at the center profile under both the inflow and surcharge conditions show that the exchange flow is directly related to the water level on the surface and the junction area between the manhole and right pipe.The results demonstrate the potential application of CFD in analyzing the interaction of urban flood flows,which can provide much clearer details of the interaction process.关键词
流体动力学(CFD)/交换流量/城市洪水模型/堰流公式Key words
computational fluid dynamics (CFD)/exchange flow rate/urban flood model/weir and orifice formula分类
建筑与水利引用本文复制引用
耿艳芬,毛剑东,王志力,郭华强..基于计算流体力学的地表径流与地下管流的交互分析[J].东南大学学报（英文版）,2020,36(2):198-205,8.基金项目
The National Natural Science Foundation of China(No.51979040). （No.51979040）
