| Title: |
Mechanism Responsible for the Complete Suppression of Karman Vortex in Flows Past a Wavy Square-Section Cylinder |
| First author: |
Lin Liming; Ling Guocan; Wu Yingxiang |
| Abstract: |
The Karman vortex shedding is totally suppressed in flows past a wavy square-section cylinder at a Reynolds number of 100 and the wave steepness of 0.025. Such a phenomenon is illuminated by the numerical simulations. In the present study, the mechanism responsible for it is mainly attributed to the vertical vorticity. The geometric disturbance on the rear surface leads to the appearance of spanwise flow near the base. The specific vertical vorticity is generated on the rear surface and convecting into the near wake. The wake flow is recirculated with the appearance of the pair of recirculating cells. The interaction between the upper and lower shear layers is weakened by such cells, so that the vortex rolls could not be formed and the near wake flow becomes stable.
|
| Contact the author: |
Lin Liming |
| Page number: |
034702 |
| Issue: |
3 |
| Subject: |
|
| Authors units: |
|
| PubYear: |
2010 |
| Volume: |
27 |
| Unit code: |
115111 |
| Publication name: |
CHINESE PHYSICS LETTERS |
| The full text link: |
|
| Full papers: |
|
| Departmens of first author: |
LNM-LHO |
| Paper source: |
|
| Paper type: |
AK |
| Participation of the author: |
|
| ISSN: |
0256-307X |
