On Vorticity Dynamics in Turbulent Wake behind Circular Cylinder

0575052 - ÚT 2024 FR eng C - Konferenční příspěvek (zahraniční konf.)
Uruba, Václav - Procházka, Pavel P.
On Vorticity Dynamics in Turbulent Wake behind Circular Cylinder.
MATEC Web of Conferences. Vol. 369. Grenoble: EDP Sciences, 2022, č. článku 05001. E-ISSN 2261-236X.
[MATEC Web of Conferences : MDFMT & XXIII. AEaNMiFMaE-2022 /40./. Piešťany (SK), 12.09.2022-14.09.2022]
Institucionální podpora: RVO:61388998
Klíčová slova: cylinder * wake * turbulence * vorticity * dynamics
Obor OECD: Applied mechanics
https://www.matec-conferences.org/articles/matecconf/pdf/2022/16/matecconf_aenmmte2022_05001.pdf

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.
Trvalý link: https://hdl.handle.net/11104/0351477