Sensitivity of turbulent Schmidt number and turbulence model to simulations of jets in crossflow |
| |
| Affiliation: | 1. Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea;2. Department of Mechanical Engineering, Pukyong National University, Busan 48513, Republic of Korea;3. Clean Combustion Research Center (CCRC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;1. Computational Science Ltd, 30a Bedford Place, Southampton SO15 2DG, UK;2. Faculty of Engineering and Environment, University of Southampton, Southampton SO17 1BJ, UK;3. Department of Industrial Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy;4. Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK |
| |
| Abstract: | Environmental discharges have been traditionally designed by means of cost-intensive and time-consuming 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. |
| |
| Keywords: | Momentum jet Turbulent Schmidt number RANS Physical modelling Numerical modelling |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
