Conditional analysis of the instantaneous wall friction during by-pass transition of rough wall boundary layer

0384359 - ÚT 2013 RIV HU eng C - Konferenční příspěvek (zahraniční konf.)
Hladík, Ondřej - Jonáš, Pavel - Mazur, Oton - Uruba, Václav
Conditional analysis of the instantaneous wall friction during by-pass transition of rough wall boundary layer.
The 15th International Conference on Fluid Flow Technologies. Budapest: Budapest University of Technology and Economics, 2012 - (Vad, J.), s. 963-970. ISBN 978-963-08-4587-8.
[International Conference on Fluid Flow Technologies /15./. Budapest (HU), 04.09.2012-07.09.2012]
Grant CEP: GA ČR GAP101/12/1271
Institucionální podpora: RVO:61388998
Klíčová slova: by-pass transition * conditional analysis of the wall friction * CTA * rough wall boundary layer * transitional intermittency factor
Kód oboru RIV: BK - Mechanika tekutin

The transitional intermittency was investigated in zero pressure gradient boundary layers developing on plate covered with sand paper (grits 60). The free stream mean velocity was 5 m/s and the free stream turbulence level was either natural 0.3 percent or it was risen up to 3 percent by means of two squared mesh plane grids generating the dissipation lenth parameter 3.8 mm or 33.4 mm respectively. The results are compared with those received in the smooth wall boundary layer
Trvalý link: http://hdl.handle.net/11104/0214041