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Erschienen in:
2018 | OriginalPaper | Buchkapitel
CFD Modeling of Wastewater Discharges in a Sewer System
verfasst von : Sonia Ben Hamza, Nejla Mahjoub Saïd, Hervé Bournot, Georges Le Palec
Erschienen in: Design and Modeling of Mechanical Systems—III
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Abstract
The malfunctioning of combined sewer systems can lead to an uncontrolled discharge of wastewater into receiving environments causing very serious pollution. The protection of these environments requires a control of the flows and the pollutants concentration. This approach takes into account the hydraulic operation of the sewer systems and the mechanism of the pollutant transfer. In this work, we are interested in a portion of a sewer system of Monastir city in order to reproduce the hydraulic phenomena that occur there. The numerical study was treated using “ANSYS Fluent” software. The standard k-ε turbulence model and the multiphase VOF model are used in this work. The exploitation of the results is mainly carried out on the flow rates, the water velocities, and the free surface. Then, we described the evolution of the pollutant concentration, the free surface, and the sediment deposition by examining the various mechanisms of the turbulent flow.