Dynamics of Flow-Field behind Backward-Facing Step in the Plane of Symmetry

0438075 - ÚT 2015 RIV CZ eng C - Conference Paper (international conference)
Uruba, Václav
Dynamics of Flow-Field behind Backward-Facing Step in the Plane of Symmetry.
28th Symposium on Anemometry. Praha: Institute of Hydrodynamics ASCR, v. v. i., 2014 - (Chára, Z.; Klaboch, L.), s. 84-93. ISBN 978-80-87117-11-8.
[Symposium on Anemometry /28./. Holany-Litice (CZ), 03.06.2014-04.06.2014]
R&D Projects: GA ČR GAP101/10/1230
Institutional support: RVO:61388998
Keywords : backward-facing step * dynamics * narrow channel
Subject RIV: BK - Fluid Dynamics

Dynamics of the flow-field behind a backward-facing step in a narrow channel is studied experimentally using time-resolved PIV technique in the measuring plane being the plane of symmetry in the streamwise direction. The channel width is 4 step heights, Reynolds number based on the step height was about 7 200. Instability of the free shear layer of Kelvin-Helmholtz type is observed. Dynamics of the flow is studied using the Bi-Orthogonal Decomposition (BOD) and Oscillation Pattern Decomposition (OPD) techniques. Typical time-mean structures of velocity statistics as well as dynamical structures are to be presented.
Permanent Link: http://hdl.handle.net/11104/0242879