Počet záznamů: 1  

Dynamics of reattachment region behind backward-facing step in a narrow channel

  1. 1. 0438140 - UT-L 2015 RIV DE eng J - Článek v odborném periodiku
    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]
    Grant CEP: GA ČR GAP101/10/1230
    Institucionální podpora: RVO:61388998
    Klíčová slova: backward facing step * reattachment * channel flow
    Kód oboru RIV: BK - Mechanika tekutin
    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.
    Trvalý link: http://hdl.handle.net/11104/0242636