Reference : Sensitivity of turbulent Schmidt number and turbulence model to simulations of jets i...
Scientific journals : Article
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/198101
Sensitivity of turbulent Schmidt number and turbulence model to simulations of jets in crossflow
English
Valero Huerta, Daniel mailto [Université de Liège - ULiège > > > Form. doct. sc. ingé. & techn. (archi., gén. civ. - paysage)]
Bung, Daniel B mailto [FH Aachen > Hydraulic Engineering Section > > >]
Apr-2016
Environmental Modelling and Software
Elsevier Science
82
218-228
Yes (verified by ORBi)
International
1364-8152
[en] Momentum jet ; Turbulent Schmidt number ; RANS ; Physical modelling ; Numerical modelling
[en] Environmental discharges have been traditionally designed by means of cost-intensive and timeconsuming experimental studies. Some extensively validated models based on an integral approach have been often employed for water quality problems, as recommended by USEPA (i.e.: CORMIX). In this study, FLOW-3D is employed for a full 3D RANS modelling of two turbulent jet-to-crossflow cases, including free surface jet impingement. Results are compared to both physical modelling and CORMIX to better assess model performance. Turbulence measurements have been collected for a better understanding of turbulent diffusion's parameter sensitivity. Although both studied models are generally able to reproduce jet trajectory, jet separation downstream of the impingement has been reproduced only by RANS modelling. Additionally, concentrations are better reproduced by FLOW-3D when the proper turbulent Schmidt number is used. This study provides a recommendation on the selection of the turbulence model and the turbulent Schmidt number for future outfall structures design studies.
Urban and Environmental Engineering
Researchers ; Professionals
http://hdl.handle.net/2268/198101
10.1016/j.envsoft.2016.04.030
http://www.sciencedirect.com/science/article/pii/S1364815216301256

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