Spanwise length effects on three-dimensional modelling of flow over a circular cylinder

✍ Scribed by C. Lei; L. Cheng; K. Kavanagh

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 492 KB
• Volume: 190
• Category: Article
• ISSN: 0045-7825
• DOI: 10.1016/s0045-7825(00)00272-3

✦ Synopsis

In this study, both the two-dimensional (2-D) and three-dimensional (3-D) vortex shedding ¯ows around a circular cylinder are solved using a ®nite dierence method. Numerical experiments are carried out to investigate the spanwise length eects on the prediction of global parameters and the near-wake ¯ow ®eld. The calculated Reynolds number is 1000. The results indicate clearly that the 2-D simulation gives inaccurate predictions at the present Reynolds number. The predictions are signi®cantly improved in 3-D simulations, but inaccuracies may also occur if the spanwise length is set too small. Good agreement with experimental data can be achieved with spanwise lengths above twice the cylinder diameters.