Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

On Dynamics of the Wake Behind a Wall Mounted Finite Length Cylinder
Uruba V., Procházka P.
Abstract:
Dynamics of the wake behind a finite-length circular cylinder with an aspect ratio 2 is to be studied experimentally. The cylinder, mounted perpendicular to a ground plane, was exposed to a cross-flow with a thin boundary layer developed on the wall. The Reynolds number was 9700. The time-resolved Particle Image Velocimetry technique was used to investigate the dynamics of the wake in two planes parallel to the flow. Particular attention was paid to tip vortices, Kármán-like vortices and arch vortex dynamics in the near wake. Several kinds of vortex streets in the wake were identified and studied.
Keywords:
circular cylinder, finite length, wake, dynamics, 3D structure

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2025.033

In Proceedings Topical Problems of Fluid Mechanics 2025, Prague, 2025, Edited by David Šimurda and Tomáš Bodnár, pp. 249 ISBN 978-80-87012-05-5 (Print) ISSN 2336-5781 (Print)