Hairpin Vortices in Turbulent Boundary Layer

0360683 - ÚT 2012 RIV CZ eng C - Conference Paper (international conference)
Uruba, Václav - Hladík, Ondřej
Hairpin Vortices in Turbulent Boundary Layer.
30. Setkání kateder mechaniky tekutin a termomechaniky. Liberec: Technická univerzitá v Liberci, 2011 - (Peukert, P.), s. 253-257. ISBN 978-80-7372-747-5.
[Setkání kateder mechaniky tekutin a termomechaniky /30./. Liberec (CZ), 22.06.2011-24.06.2011]
R&D Projects: GA ČR GA101/08/1112; GA ČR GAP101/10/1230
Institutional research plan: CEZ:AV0Z20760514
Keywords : turbulence * hairpin vortex * rough surface
Subject RIV: BK - Fluid Dynamics

The experiments on dynamics of turbulent boundary layer on the plane rough wall without pressure gradient are to be presented. Sand roughness of the wall is considered. Measurements are carried out using Time-Resolved PIV technique in plains parallel and perpendicular to the wall. The results on rough wall are compared with the base case of boundary layer on smooth wall. Hairpin vortices and theirs packets have been detected. Topology and typical size of those structures substantially differ in the cases in question.
Permanent Link: http://hdl.handle.net/11104/0198177