Opperman, Taylor et Wang, Bingchen.
2025.
« Dns study of turbulent flows in a large-amplitude wavy-walled channel ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
Turbulent flow in a channel with a wavy bottom wall of varying Reynolds numbers (Re=5600 and 9000) and a large wave amplitude-to-period ratio of A/P=0.4 has been studied using direct numerical simulation (DNS). The Reynolds number effect on the turbulent flow has been thoroughly investigated through the analyses of the first- and second-order statistical moments of the velocity field. A separation region is observed in the wave troughs where the streamwise velocity is reduced and reversed, resulting in a region of augmented mean velocity and shear stresses. The turbulence kinetic energy (TKE) field is studied in physical space through mean contours and a budget balance of the TKE transport equation. Interestingly, unlike a smooth-channel flow, the turbulent production is shown to decrease with an increasing Reynolds number. The influence of Reynolds number on the TKE and turbulent production is further examined using the joint probability density function of the velocity fluctuations and pre-multiplied energy spectra.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:17 |
| Dernière modification: | 18 déc. 2025 15:17 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32477 |
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