Numerical study of Tallinn storm-water system flooding conditions using CFD simulations of multi-phase flow in a large-scale inverted siphon

3rd International Conference on Innovative Materials, Structures and Technologies

Kaur, K.^1 ; Laanearu, J.^1 ; Annus, I.^1

Department of Civil Engineering and Architecture, School of Engineering, Tallinn University of Technology, Tallinn

19086, Estonia^1

关键词: Computational Fluid Dynamics software;    Computational results;    Design flow rate;    Hydraulic system;    Initial conditions;    Numerical experiments;    Quantitative interpretation;    Three-phase flow;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/251/1/012128/pdf
DOI  :  10.1088/1757-899X/251/1/012128

来源: IOP

【 摘 要 】

The numerical experiments are carried out for qualitative and quantitative interpretation of a multi-phase flow processes associated with malfunctioning of the Tallinn storm-water system during rain storms. The investigations are focused on the single-line inverted siphon, which is used as under-road connection of pipes of the storm-water system under interest. A multi-phase flow solver of Computational Fluid Dynamics software OpenFOAM is used for simulating the three-phase flow dynamics in the hydraulic system. The CFD simulations are performed with different inflow rates under same initial conditions. The computational results are compared essentially in two cases 1) design flow rate and 2) larger flow rate, for emptying the initially filled inverted siphon from a slurry-fluid. The larger flow-rate situations are under particular interest to detected possible flooding. In this regard, it is anticipated that the CFD solutions provide an important insight to functioning of inverted siphon under a restricted water-flow conditions at simultaneous presence of air and slurry-fluid.