Počet záznamů: 1

Dynamics of turbulent spots in transitional boundary layer

  1. 1.
    0370280 - UT-L 2012 RIV GB eng J - Článek v odborném periodiku
    Hladík, Ondřej - Jonáš, Pavel - Uruba, Václav
    Dynamics of turbulent spots in transitional boundary layer.
    Journal of Physics: Conference Series. Roč. 318, č. 032028 (2011), s. 1-5 E-ISSN 1742-6596.
    [European turbulence conference /13./. Warsaw, 12.09.2011-15.09.2011]
    Grant CEP: GA ČR GA101/08/1112; GA ČR GAP101/10/1230
    Výzkumný záměr: CEZ:AV0Z20760514
    Klíčová slova: boundary layer transition * hairpin vortex * calmed region
    Kód oboru RIV: BK - Mechanika tekutin

    The turbulent spots appearance, topology and dynamics on a at-plate boundary layer in zero pressure gradient during its transition to turbulence is investigated experimentally using time-resolved PIV technique. The intermittently appearing turbulent spots are subjected to detailed study. The hairpin packets organized in regular streamwise rows having fractal structure in the same time are identied in spots. Elongated vortical structures have been recognized in the spots rear-part. The calmed region is characterized by presence of low-velocity streaks originating between the elongated structures.
    Trvalý link: http://hdl.handle.net/11104/0204126