Název:
On the 3D Dynamics of the Wake Behind a Circular Cylinder
Autoři:
Uruba, Václav ; Procházka, Pavel P. ; Skála, Vladislav Typ dokumentu: Příspěvky z konference Konference/Akce: Topical Problems of Fluid Mechanics 2020, Praha (CZ), 20200219
Rok:
2020
Jazyk:
eng
Abstrakt: Flow in the wake of a circular cylinder is studied experimentally using time-resolved stereo PIV method. Special attention is paid to 3D topology of dynamical structures. While the distribution of statistic quantities along the cylinder is uniform, and i.e. 2D, the instantaneous flow structure is fully 3D. Within the velocity fluctuating flow field the structures containing streamwise vorticity and velocity components are dominant. The POD modes connected with von Kármán vortex street are identified.
Klíčová slova:
3D structure; circular cylinder; POD; wake Číslo projektu: GA17-01088S (CEP), GC19-02288J (CEP) Poskytovatel projektu: GA ČR, GA ČR Zdrojový dokument: Topical Problems of Fluid Mechanics 2020, ISBN 978-80-87012-74-1, ISSN 2336-5781