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Dynamics of turbulent spots in transitional boundary layer
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SYSNO ASEP 0370280 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dynamics of turbulent spots in transitional boundary layer Author(s) Hladík, Ondřej (UT-L) RID
Jonáš, Pavel (UT-L) RID
Uruba, Václav (UT-L) RID, ORCIDNumber of authors 3 Source Title Journal of Physics: Conference Series. - : Institute of Physics Publishing - ISSN 1742-6588
Roč. 318, č. 032028 (2011), s. 1-5Number of pages 5 s. Action European turbulence conference /13./ Event date 12.09.2011-15.09.2011 VEvent location Warsaw Country PL - Poland Event type WRD Language eng - English Country GB - United Kingdom Keywords boundary layer transition ; hairpin vortex ; calmed region Subject RIV BK - Fluid Dynamics R&D Projects GA101/08/1112 GA ČR - Czech Science Foundation (CSF) GAP101/10/1230 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000301336300028 DOI 10.1088/1742-6596/318/3/032028 Annotation 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. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012 Electronic address http://iopscience.iop.org/1742-6596/318/3/032028?fromSearchPage=true
Number of the records: 1