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Numerical Research of Flows into Gullies with Different Outlet Locations

1
MARE, Department of Civil Engineering, University of Coimbra, 3030-788 Coimbra, Portugal
2
Hydrology and River Basin Management, Technical University of Munich, 80333 München, Germany
3
National Laboratory for Civil Engineering—LNEC, 1700-066 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Water 2019, 11(4), 794; https://doi.org/10.3390/w11040794
Received: 2 March 2019 / Revised: 3 April 2019 / Accepted: 10 April 2019 / Published: 17 April 2019
(This article belongs to the Section Hydraulics)
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Abstract

Gullies are sewer inlets placed in pavements usually covered by bar grates. They are the most common linking-element used to drain a wide range of flows from surface runoff into the buried drainage system. Their hydraulic behavior and their overall hydraulic performance is dependent on the flow conditions, the gully dimension, geometry, and location of the outlet device. Herein a numerical research based on Volume Of Fluid ( V O F ) to detect the interface, and on the Shear Stress Transport S S T k - ω turbulence model was conducted to study the importance of the outlet location and characterize flows through them in drainage conditions. Results provided detailed information about flow features, discharge coefficients, and efficiencies for different outlet locations. The authors identified three different regimes, R 1 , R 2 , and R 3 , and concluded that the outlet location influences the velocity field along the gully, the discharge coefficient, and the drainage efficiency. This allows for the estimation of uncertainty and its variation for different outlet positions. View Full-Text
Keywords: drainage systems; gullies; linking-element; discharge capacity; OpenFOAM®; VOF; SSTk-ω turbulence model drainage systems; gullies; linking-element; discharge capacity; OpenFOAM®; VOF; SSTk-ω turbulence model
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Carvalho, R.F.; Lopes, P.; Leandro, J.; David, L.M. Numerical Research of Flows into Gullies with Different Outlet Locations. Water 2019, 11, 794.

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