10.4122/1.1000001462
Riviere, N.
N.
Riviere
Perkins, R. J.
R. J.
Perkins
Chocat, B.
B.
Chocat
Lecus, A.
A.
Lecus
Flooding flows in city crossroads: experiments and 1D modelling
DTU Library, Technical University of Denmark (DTU)
2005
Conference full text
Urban drainage
experiments
simulations
flow junction
subcritical flow
Laboratoire De M\303\251canique Des Fluides Et D\342\200\231Acoustique, INSA De Lyon
INSA De Lyon
Laboratoire De M\303\251canique Des Fluides Et D\342\200\231Acoustique
Laboratoire De M\303\251canique Des Fluides Et D\342\200\231Acoustique, Ecole Centrale De Lyon
Ecole Centrale De Lyon
Laboratoire De M\303\251canique Des Fluides Et D\342\200\231Acoustique
Unit\303\251 De Recherche En G\303\251nie Civil, INSA De Lyon
INSA De Lyon
Unit\303\251 De Recherche En G\303\251nie Civil
2005
en
10.4122/1.1000001461
application/pdf
This study focuses on the discharge distribution in an intersection of four channels, similar to a city crossroad. The channels and the intersection are all horizontal. Flow enters through two of the channels, and leaves through the other two. The flow is subcritical everywhere, and flow depths are controlled by vertical weirs at the exits of the outlet channels. The main variables that are measured are the flow rates in the four channels. When the weir heights in the outlet channels are the same, the ratio of flowrates in the outlet channels depends only on the ratio of flowrates in the inlet channels; if the outlet conditions are different, other parameters, such as the total flow rate also become important. The flow has also been simulated numerically using a solution of the 1-D St. Venant equations, with a simple model to predict flow distribution in the intersection. A comparison with the experimental data shows that this model works well for the limited range of experimental conditions studied here. However further work is needed on a wider range of conditions, closer to real conditions, before the model can be considered valid for practical applications.