Wake Behind a Cylinder: An Overview of Spatio-Temporal Aspects

0570798 - ÚT 2024 CZ eng C - Konferenční příspěvek (zahraniční konf.)
Uruba, Václav
Wake Behind a Cylinder: An Overview of Spatio-Temporal Aspects.
Engineering mechanics 2022. Book of full texts. Prague: Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2022 - (Fischer, C.; Náprstek, J.), s. 7-16. ISBN 978-80-86246-48-2. ISSN 1805-8248. E-ISSN 1805-8256.
[International Conference Engineering mechanics 2022. Milovy (CZ), 09.05.2022-12.05.2022]
Institucionální podpora: RVO:61388998
Klíčová slova: circular cylinder * wake * vortex * dynamics * 3D structure
Obor OECD: Applied mechanics
https://www.engmech.cz/improc/2022/007.pdf

A circular cylinder in crossflow is subjected to the overview study from the point of view spatial and temporal characteristics. It represents itself a typical engineering problem, appearing in practice frequently in various forms. In fluid mechanics, this case is considered to be a typical canonical case, with relatively simple and straightforward definition, but complex and dynamical flow topology. The typical dynamics is characterized by quasi-periodic behavior called von Kármán – Bénard vortex street with a typical frequency expressed in dimensionless number called Strouhal number. The wake flow structure is considered to be characterized by a single frequency and 2D topology, homogeneous along the cylinder axis, very often. The presented paper concentrates on differences between this commonly accepted model and physical reality. Both temporal and spatial aspects of the flow in the wake behind a cylinder are to be addressed. The turbulent subcritical wake characterized by Reynolds number about 5 thousand will be considered, as this situation is a typical case in mechanical engineering applications.
Trvalý link: https://hdl.handle.net/11104/0351473