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Water Practice & Technology © IWA Publishing 2007  |  doi10.2166/wpt.2007.040

Experimental and computational study of velocity fields in narrow or compound section sewers

H. Bonakdari1,3,4, F. Larrarte1,4, J-B. Bardiaux2,4

1Laboratoire Central des Ponts et Chaussées, Division eau et environnement route de Bouaye, BP 4129, 44341 Bouguenais Cedex, France
2Ecole Nationale du Génie de l'Eau et de l'Environnement de Strasbourg 1, quai Koch, B.P. 61039 , 67070 Strasbourg cedex, France
3Département de Génie Civil, Université de Razi, Kermanshah, Iran
3Groupement pour l'évaluation des mesures et des composants en eaux et assainissement, 149, rue Gabriel PERI. 54500 Vandoeuvre Les Nancy, France

ABSTRACT

Sound management of sewer networks and minimization of the pollution discharged into receiving waters through combined sewer overflows need in-depth knowledge of the flow rates and pollutant loads conveyed in sewers. This knowledge relies on a good assessment of the spatial distribution of the velocities in a cross section, as they are involved both in flowrate, and distribution of concentration. The possibility of assessing this distribution by using computational fluid dynamics is explored and compared with experimental results collected from real sewers.

Keywords: Computational fluid dynamics; Field measurements; Flow velocity; Sewer.


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