| Issue |
MATEC Web Conf.
Volume 369, 2022
40th Annual Conference - Meeting of the Departments of Fluid Mechanics and Thermomechanics in the connection with XXIII. International Scientific Conference - The Application of Experimental and Numerical Methods in Fluid Mechanics and Energy (40th. MDFMT & XXIII. AEaNMiFMaE-2022)
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| Article Number | 05001 | |
| Number of page(s) | 8 | |
| Section | Visualization of Flow | |
| DOI | https://doi.org/10.1051/matecconf/202236905001 | |
| Published online | 04 November 2022 | |
On Vorticity Dynamics in Turbulent Wake behind Circular Cylinder
1 Department of Power System Engineering, Faculty of Mechanical Engineering, University of West Bohemia, Universitní 8, 306 14 Plzeň, Czech Republic
2 Department of Fluid Dynamics, Institute of Thermomechanics of the Czech Academy of Sciences, Dolejškova 5, 182 00 Praha, Czech Republic
* Corresponding author: uruba@it.cas.cz
The circular cylinder turbulent wake is studied experimentally using Particle Image Velocimetry (PIV) method. The vorticity component parallel to the cylinder axis is evaluated from measured velocity field. Dynamics of the vorticity field is analysed using the Oscillation Pattern Decomposition (OPD) method. The 3 dominant modes corresponding to the 1st, 2nd and 3rd harmonics of Strouhal frequency are detected and presented. The corresponding topologies are characterized by waves of vortical systems. The results are similar to the dynamics of velocity field, however the procedure is much easier to implement, as only half number of degrees of freedom are active.
Key words: cylinder / wake / turbulence / vorticity / dynamics
© The Authors, published by EDP Sciences, 2022
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