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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. Cambridge University Press. DOI: 10.1017/jfm.2012.60.

Full text not available from this repository.

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

Abstract

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
Authors:
AuthorsInstitution or Email of Authors
Elsinga, GerritTU-Delft, NL
Poelma, ChristianDelft University of Technology, NL
Schröder, AndreasUNSPECIFIED
Geisler, ReinhardUNSPECIFIED
Scarano, FulvioTU-Delft, NL
Westerweel, JerryDelft University of Technology, NL
Date:2012
Journal or Publication Title:Journal of Fluid Mechanics
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1017/jfm.2012.60
Publisher:Cambridge University Press
Status:Published
Keywords:boundary layers, turbulent boundary layers, turbulent convection
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation
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:20 Mar 2013 19:45

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