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Water 2016, 8(12), 587; doi:10.3390/w8120587

Experimental and Numerical Analysis of Egg-Shaped Sewer Pipes Flow Performance

Universidade da Coruña, Water and Environmental Engineering Group (GEAMA), Elviña, 15071 A Coruña, Spain
Author to whom correspondence should be addressed.
Academic Editor: Peter J. Coombes
Received: 11 November 2016 / Revised: 30 November 2016 / Accepted: 6 December 2016 / Published: 9 December 2016
(This article belongs to the Special Issue Urban Water Challenges)
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A Computational Fluid Dynamics (CFD) model was developed to analyze the open-channel flow in a new set of egg-shaped pipes for small combined sewer systems. The egg-shaped cross-section was selected after studying several geometries under different flow conditions. Once the egg-shaped cross-section was defined, a real-scale physical model was built and a series of partial-full flow experiments were performed in order to validate the numerical simulations. Furthermore, the numerical velocity distributions were compared with an experimental formulation for analytic geometries, with comparison results indicating a satisfactory concordance. After the hydraulic performance of the egg-shaped pipe was analyzed, the numerical model was used to compare the average velocity and shear stress against an equivalent area circular pipe under low flow conditions. The proposed egg shape showed a better flow performance up to a filling ratio of h/H = 0.25. View Full-Text
Keywords: CFD modeling; egg-shaped section; sewer design; shear stress; velocity distributions; water pipelines CFD modeling; egg-shaped section; sewer design; shear stress; velocity distributions; water pipelines

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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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Regueiro-Picallo, M.; Naves, J.; Anta, J.; Puertas, J.; Suárez, J. Experimental and Numerical Analysis of Egg-Shaped Sewer Pipes Flow Performance. Water 2016, 8, 587.

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