| Issue |
MATEC Web Conf.
Volume 412, 2025
42nd. Annual Conference “Meeting of the Departments of Fluid Mechanics and Thermomechanics” in the connection with XXIV. International Scientific Conference “The Application of Experimental and Numerical Methods in Fluid Mechanics and Energy” (42nd. MDFMT & XXIV. AENMMTE-2025)
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| Article Number | 05004 | |
| Number of page(s) | 8 | |
| Section | Visualization of Flow | |
| DOI | https://doi.org/10.1051/matecconf/202541205004 | |
| Published online | 05 September 2025 | |
On the streamwise vorticity in the wake behind a circular cylinder of finite length
1 University of West Bohemia, Faculty of Mechanical Engineering, Department of Power System Engineering, Universitní 8, 301 00 Plzeň, CR
2 Institute of Thermomechanics of the Czech Academy of Sciences, Dolejškova 5, 182 00 Praha 8, CR
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
The streamwise vorticity component is studied in the wake behind a finite-length circular cylinder attached to a wall. The cylinder, with an aspect ratio of 2, is subjected to cross-flow; the Reynolds number, based on the cylinder diameter, was 9.7 thousand. The Stereo PIV method was used in several measuring planes oriented perpendicularly to the flow at distances ranging from 1.667 to 11 cylinder diameters from the axis. A dominating counter-rotating vortex couple was detected in the time-mean field of the wake. High-intensity vorticity fluctuating activity was observed in the near wake central part, in the streamwise distance between 2 and 5 diameters close to the wall.
© The Authors, published by EDP Sciences, 2025
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