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Dynamics of reattachment region behind backward-facing step in a narrow channel
- 1.0438140 - ÚT 2015 RIV DE eng J - Journal Article
Uruba, Václav
Dynamics of reattachment region behind backward-facing step in a narrow channel.
Proceedings in Applied Mathematics and Mechanics. Roč. 14, č. 1 (2014), s. 641-642. ISSN 1617-7061.
[Annual Meeting of the International Association of Applied Mathematics and Mechanics /85./. Erlangen, 10.03.2014-14.03.2014]
R&D Projects: GA ČR GAP101/10/1230
Institutional support: RVO:61388998
Keywords : backward facing step * reattachment * channel flow
Subject RIV: BK - Fluid Dynamics
http://onlinelibrary.wiley.com/doi/10.1002/pamm.201410305/abstract
Reattachment region in the channel flow behind backward-facing step is studied for various Reynolds numbers in the range 7-35 thousands (based on incoming flow velocity and step height). Results of experiments obtained using time resolved PIV method applied on the region close to the channel bottom indicating skin friction are to be presented. Dynamical features of the flow-field are studied in detail using Oscillation Pattern Decomposition method. Several types of low-frequency dynamical structures are shown in this region including spirals and nodes. Typical frequencies connected with this structures behavior are evaluated. Time mean picture of the skin friction distribution on the channel bottom is close to2D structure, while dynamical structure is fully 3D.
Permanent Link: http://hdl.handle.net/11104/0242636
Number of the records: 1