Dynamical structure of the turbulent boundary layer on rough surface

0360701 - ÚT 2012 RIV AT eng A - Abstract
Uruba, Václav - Jonáš, Pavel - Hladík, Ondřej
Dynamical structure of the turbulent boundary layer on rough surface.
82nd Annual Scientific Conference of the International Association of Applied Mathematics and Mechanics. Graz: Graz University of Technology, 2011 - (Brenn, G.). s. 279-279. ISBN 978-3-85125-145-6.
[Annual Scientific Conference of the International Association of Applied Mathematics and Mechanics /82./. 18.04.2011-21.04.2011, Graz]
R&D Projects: GA ČR GA101/08/1112; GA ČR GAP101/10/1230
Institutional research plan: CEZ:AV0Z20760514
Keywords : turbulent boundary layer * dynamics * 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. Dynamics of the patterns is studied using Proper Orthogonal Decomposition technique evaluating energetic structures in the flow. The results on rough wall are compared with the base case of boundary layer on smooth wall.
Permanent Link: http://hdl.handle.net/11104/0198189