[1] Geng Yanfen, Mao Jiandong, Wang Zhili, Guo Huaqiang, et al. Analysis of interaction between surface and sewer pipe systembased on computational fluid dynamics [J]. Journal of Southeast University (English Edition), 2020, 36 (2): 198-205. [doi:10.3969/j.issn.1003-7985.2020.02.010]

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Analysis of interaction between surface and sewer pipe systembased on computational fluid dynamics()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

36

Issue:

2020 2

Page:

198-205

Research Field:

Other Disciplines

Publishing date:

2020-06-20

Info

Title:

Analysis of interaction between surface and sewer pipe systembased on computational fluid dynamics

Author(s):

Geng Yanfen¹;  Mao Jiandong¹;  Wang Zhili²;  Guo Huaqiang¹

¹School of Transportation, Southeast University, Nanjing 211189, China
²State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China

Keywords:

computational fluid dynamics(CFD);  exchange flow rate;  urban flood model;  weir and orifice formula

PACS:

TV131.2;U611

DOI:

10.3969/j.issn.1003-7985.2020.02.010

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 Navier-Stokes 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.

References:

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Memo

Memo:

Biography: Geng Yanfen(1978—), female, doctor, associate professor, yfgeng@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51979040).
Citation: Geng Yanfen, Mao Jiandong, Wang Zhili, et al. Analysis of interaction between surface and sewer pipe system based on computational fluid dynamics[J].Journal of Southeast University(English Edition), 2020, 36(2):198-205.DOI:10.3969/j.issn.1003-7985.2020.02.010.

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