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Numerical and Physical Modeling to Improve Discharge Rates in Open Channel Infrastructures

1
School of Science and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia
2
IMT Atlantique Bretagne—Pays de Loire, Department of Energy Systems and Environment, 44307 Nantes, France
*
Author to whom correspondence should be addressed.
Water 2019, 11(7), 1414; https://doi.org/10.3390/w11071414
Received: 6 June 2019 / Revised: 5 July 2019 / Accepted: 8 July 2019 / Published: 10 July 2019
(This article belongs to the Section Hydraulics)
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Abstract

This paper presents the findings of a study into how different inlet designs for stormwater culverts increase the discharge rate. The objective of the study was to develop improved inlet designs that could be retro-fitted to existing stormwater culvert structures in order to increase discharge capacity and allow for changing rainfall patterns and severe weather events that are expected as a consequence of climate change. Three different chamfer angles and a rounded corner were simulated with the software ANSYS Fluent, each of the shapes tested in five different sizes. Rounded and 45 chamfers at the inlet edge performed best, significantly increasing the flow rate, though the size of the configurations was a critical factor. Inlet angles of 30 and 60 caused greater turbulence in the simulations than did 45 and the rounded corner. The best performing shape of the inlet, the rounded corner, was tested in an experimental flume. The flume flow experiment showed that the optimal inlet configuration, a rounded inlet (radius = 1/5 culvert width) improved the flow rate by up to 20% under submerged inlet control conditions. View Full-Text
Keywords: culvert; culvert design; culvert hydraulics; culvert retrofitting; discharge capacity; inlet optimization; ANSYS Fluent culvert; culvert design; culvert hydraulics; culvert retrofitting; discharge capacity; inlet optimization; ANSYS Fluent
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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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Jaeger, R.; Tondera, K.; Jacobs, C.; Porter, M.; Tindale, N. Numerical and Physical Modeling to Improve Discharge Rates in Open Channel Infrastructures. Water 2019, 11, 1414.

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