NDLI: Impact of topographic obstacles on the discharge distribution in open-channel bifurcations

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Impact of topographic obstacles on the discharge distribution in open-channel bifurcations

Content Provider	Semantic Scholar
Author	Mignot, Emmanuel Zeng, Cheng Dominguez, Gaston Li, Chen Nicolás Rivière, Etienne Bazin, -L.
Copyright Year	2017
Abstract	13 When simulating urban floods, most approaches have to simplify the topography of the city and cannot 14 afford to include the obstacles located in the streets such as bus stops, trees, parked cars, etc. The aim of the 15 present paper is to investigate the error made when neglecting such singularities in a simple flooded 3-branch 16 crossroad configuration with a specific concern regarding the error in discharge distribution to the 17 downstream streets. Experimentally, the discharge distribution for 14 flows in which 9 obstacles occupying 18 1/6 of the flow section are introduced one after the other is measured using electromagnetic flow-meters. The 19 velocity field for one given flow is obtained using horizontal-PIV. Additionally, all these flows are computed 20 using a CFD methodology. It appears that the modification in discharge distribution is mostly related to the 21 location of the obstacles with regards to the intersection, the location of the separating interface and is 22 strongly impacted by the Froude number of the inflow while the influence of the normalized water depth 23 remains very limited. Overall, the change in discharge distribution induced by the obstacles remains lower 24 than 15% of the inflow discharge even for high Froude number flows. 25 26
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://hal.archives-ouvertes.fr/hal-00840412/document
Language	English
Access Restriction	Open
Subject Keyword	Accident caused by flooding Computational fluid dynamics Denial-of-service attack Discharger Downstream (software development) Experiment Floods Flow Impacted tooth Intersection of set of elements Simulation Street (environment) Topography Trees (plant) Velocity (software development)
Content Type	Text
Resource Type	Article

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