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http://dx.doi.org/10.5762/KAIS.2017.18.3.14

Friction loss of multi-purpose stormwater tunnel simulated by Flow 3D  

Lee, Du Han (Korea Institute of Civil Engineering and Building Technology)
Kim, Jung Hwan (Department of Civil Engineering, Hoseo University)
Chung, Gunhui (Department of Civil Engineering, Hoseo University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.3, 2017 , pp. 14-21 More about this Journal
Abstract
The extreme floods recently are have been attributed global warming, The development of a canal tunnel to prevent floods by making a bypass or undercurrent to flood discharge in a major flooding area is required because urban flooding in heavy rainfall occurs frequently, increasing the impermeability according to lack of capacity in sewage to urbanization by the existing urban basin. In this study, a numerical simulation was performed to support design standards for a multi-purpose waterway tunnel combined road tunnel of canal tunnel. The numerical simulation showed that the size of the friction loss occurring in the tunnel section of the same channel occurred more than the theoretically calculated frictional loss derived from the numerical simulations. This is probably due to the additional frictional loss caused by the change in the flow structure due to the geometry of the pipe when the shape of the channel is non-circular. The increase in friction loss was more pronounced in the laminar flow than in the turbulent flow. Depending on the shape of the conduit, the friction loss should be adjusted for accurate flow calculations. This result can provide the basin information about the design of flood by a pass conduit.
Keywords
Flow 3D; Friction loss; Hydraulic experiment; Multi-functional stormwater tunnel; Numerical simulation;
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