Sensitivity of turbulent Schmidt number and turbulence model to simulations of jets in crossflow

Valero Huerta, Daniel; Bung, Daniel B

doi:10.1016/j.envsoft.2016.04.030

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Sensitivity of turbulent Schmidt number and turbulence model to simulations of jets in crossflow

Valero Huerta, Daniel; Bung, Daniel B

2016 • In Environmental Modelling and Software, 82, p. 218-228

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/198101

DOI
10.1016/j.envsoft.2016.04.030

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Keywords :

Momentum jet; Turbulent Schmidt number; RANS; Physical modelling; Numerical modelling

Abstract :

[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.

Research center :

UEE - Urban and Environmental Engineering - ULiège

Disciplines :

Civil engineering

Author, co-author :

Valero Huerta, Daniel ; Université de Liège - ULiège > Form. doct. sc. ingé. & techn. (archi., gén. civ. - paysage)

Bung, Daniel B; FH Aachen > Hydraulic Engineering Section

Language :

English

Title :

Sensitivity of turbulent Schmidt number and turbulence model to simulations of jets in crossflow

Publication date :

April 2016

Journal title :

Environmental Modelling and Software

ISSN :

1364-8152

Publisher :

Elsevier Science

Volume :

Pages :

218-228

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://www.sciencedirect.com/science/article/pii/S1364815216301256

Available on ORBi :

since 09 June 2016

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