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Dynamical structure of the turbulent boundary layer on rough surface
Author(s) -
Uruba Václav,
Jonáš Pavel,
Hladík Ondřej
Publication year - 2011
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201110291
Subject(s) - turbulence , boundary layer , perpendicular , vortex , plane (geometry) , geometry , rough surface , boundary (topology) , surface roughness , surface finish , surface (topology) , mechanics , materials science , physics , mathematics , composite material , mathematical analysis
The experiments on structure of turbulent boundary layer on the plane rough wall without pressure gradient are presented. Sand roughness of the wall is considered. Measurements are carried out using Time‐Resolved PIV technique in planes 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 have been detected. Topology and typical size of those structures substantially differ in the cases in question. (© 2011 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)