DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Tracking of vortices in a turbulent boundary layer

Elsinga, Gerrit and Poelma, Christian and Schröder, Andreas and Geisler, Reinhard and Scarano, Fulvio and Westerweel, Jerry (2012) Tracking of vortices in a turbulent boundary layer. Journal of Fluid Mechanics, 697 (04), pp. 273-295. Cambridge University Press. DOI: 10.1017/jfm.2012.60. ISSN 0022-1120.

Full text not available from this repository.

Official URL: http://journals.cambridge.org/action/displayIssue?jid=FLM&volumeId=-1


The motion of spanwise vortical elements has been tracked in the outer region between wall-normal distance z/δ = 0.11 and 0.30 of a turbulent boundary layer at Reθ = 2460. The experimental dataset of time-resolved threedimensional velocity fields used has been obtained by tomographic particle image velocimetry. The tracking of these structures yields their respective average trajectories as well as the variations thereof, quantified by the root-mean-square of the trajectory coordinates as a function of time. It is demonstrated that the variation in convection can be described by a dispersion model for infinitesimal particles in homogeneous turbulence, which suggests that these vortical structures are transported passively by the external velocity field without significant changes in their topology, at least over the present observation time of 1.2δ/Ue. It is shown that the measured variation in convection velocity can further be used successfully to predict the temporal development of space-time correlation functions starting from the instantaneous correlation map. In this prediction the structures are assumed to convect without change, following our observations.

Document Type:Article
Additional Information:Published online: 6. März 2012
Title:Tracking of vortices in a turbulent boundary layer
AuthorsInstitution or Email of Authors
Elsinga, GerritTU-Delft, NL
Poelma, ChristianDelft University of Technology, NL
Schröder, Andreasandreas.schroeder@dlr.de
Geisler, Reinhardreinhard.geisler@dlr.de
Scarano, FulvioTU-Delft, NL
Westerweel, JerryDelft University of Technology, NL
Journal or Publication Title:Journal of Fluid Mechanics
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 273-295
Publisher:Cambridge University Press
Keywords:boundary layers, turbulent boundary layers, turbulent convection
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:07 Mar 2012 15:59
Last Modified:26 Mar 2015 17:08

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.