Simulation of vortex shedding past a square cylinder with different turbulence models

✍ Scribed by G. Bosch; W. Rodi

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 493 KB
• Volume: 28
• Category: Article
• ISSN: 0271-2091
• DOI: 10.1002/(sici)1097-0363(19980930)28:4<601::aid-fld732>3.0.co;2-f

✦ Synopsis

This paper presents the results of numerical simulations of vortex shedding past a free-standing square cylinder at Re D =22000, obtained with different turbulence models. Using wall functions, the standard k-m model is compared with a modification suggested by Kato and Launder (Proc. 9th Symp. Turbulent Shear Flows, Kyoto, 10-4-1 (1993)). In addition, both versions are used in a two-layer approach, in which the flow close to the cylinder is computed with a locally more suitable one-equation turbulence model and only outside the viscous near-wall layer with the two mentioned high-Re model versions. To allow a comparison, the simulations are performed first using the same computational domain and boundary conditions as in previous investigations. Then results are presented that were obtained on a computational domain and with boundary conditions more suitable for a comparison with the experiments.