Reference : Numerical Study of Turbulent Oscillations Around a Cylinder: RANS Capabilities and Se...
Scientific congresses and symposiums : Paper published in a journal
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/214197
Numerical Study of Turbulent Oscillations Around a Cylinder: RANS Capabilities and Sensitivity Analysis
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 (HES) > > >]
Erpicum, Sébastien mailto [Université de Liège > > Scientifiques attachés au Doyen (Sc.appliquées) >]
Dewals, Benjamin mailto [Université de Liège > Département ArGEnCo > Hydraulics in Environmental and Civil Engineering >]
Aug-2017
Proceedings of the 37th IAHR World Congress
3126-3135
Yes (verified by ORBi)
No
International
1063-7710
1562-6865
37th IAHR World Congress
from 13-08-2017 to 18-08-2017
IAHR
Kuala Lumpur
Malaysia
[en] Turbulence modelling ; circular pier ; flow oscillations ; instabilities
[en] Numerical modelling is commonly used in a large range of environmental fluid mechanics applications. It has become widely accepted and, with increasing computer power, the employed models are increasing also in complexity. Reynolds Averaged Navier-Stokes (RANS) equations are the preferred approach for 3D problems, being especially suited for the computation of the mean flow. However, little is known about RANS performance for the fluctuating quantities; being reasonable to expect an impairment in the accuracy. In this study, a simple geometry (cylindrical pier) is subject to different numerical settings in order to assess their effect on the development of the physically based flow instabilities. Mesh refinement has shown to enhance the perturbation growth rate while maximum CFL value has not produced any effect. RNG k-ϵ and k-ω have shown to be more dissipative than k-ϵ. Some advection schemes seem to increase the spurious perturbation converging to the physically based ones. Finally, introducing an experimentally based perturbation at the inlet has proven to speed up the process.
Urban and Environmental Engineering
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/214197

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