Prediction of pollutant dispersion in turbulent two-phase flows |
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Authors: | Nawel Khaldi Hatem Mhiri Philippe Bournot |
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Institution: | 1. UTTPI, National Engineering School of Monastir, Monastir, Tunisia 2. IUSTI, UMR CNRS 6595, 5 rue Enrico Fermi, Technopole de Chateau-Gombert, 1303, Marseille, France
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Abstract: | With a growing awareness of water pollution problems, in recent years there has been a considerable increased effort in developing and applying numerical models to predict accurately the contaminant distributions, particularly in free surface flows. This numerical study presents a predictive hydrodynamic model in order to explore the dispersion phenomenon of a pollutant injected from time-dependent sources in a turbulent free surface flow. More precisely, we study the impact of pulsation on the dispersion of an injected material. The air/water interface was modeled with the volume of fluid method and sharpness of the free surface was assured by means of Geo-Reconstruct scheme. The numerical results showed that the pulsation played a dominant role at the early stage of the pollutant transport. It was also observed that the pulsation affected the distribution of the injected material especially near the front and that a major swirling action was developed compared to the constant-rate-injection case. |
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