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A study of the three-dimensional spectral energy distribution in a zero pressure gradient turbulent boundary layer

LeHew, J. and Guala, M. and McKeon, B. J. (2011) A study of the three-dimensional spectral energy distribution in a zero pressure gradient turbulent boundary layer. Experiments in Fluids, 51 (4). pp. 997-1012. ISSN 0723-4864. https://resolver.caltech.edu/CaltechAUTHORS:20111025-073430962

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Abstract

Time-resolved particle image velocimetry (PIV) measurements performed in wall parallel planes at three wall normal locations, y^+ = 34, 108, and 278, in a zero pressure gradient turbulent boundary layer at Re_τ = 470 are used to illuminate the distribution of streamwise velocity fluctuations in a three-dimensional energy spectrum (2D in space and 1D in time) over streamwise, spanwise, and temporal wavelengths. Two high-speed cameras placed side by side in the streamwise direction give a 10δ × 5δ streamwise by spanwise field of view with a vector spacing of Δx^+ = Δz^+ ≈ 37 and a time step of Δt^+ = 0.5. Although 3D wavenumber-frequency spectra have been calculated in acoustics studies, to the authors’ knowledge this is the first time they has been calculated and presented for a turbulent boundary layer. The calculation and normalization of this spectrum, its relation to 2D and 1D spectra, and the effects of the PIV algorithm on its shape are carefully analyzed and outlined.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s00348-011-1117-zDOIUNSPECIFIED
http://www.springerlink.com/content/52315p2kg4443713/PublisherUNSPECIFIED
ORCID:
AuthorORCID
McKeon, B. J.0000-0003-4220-1583
Additional Information:© 2011 Springer-Verlag. Received: 13 January 2011. Revised: 19 April 2011. Accepted: 30 April 2011. Published online: 24 May 2011. We would like to acknowledge and thank Prof. Mory Gharib and Dr. David Jeon for their assistance and allowing us to use their free surface water tunnel facility at Caltech in which all the experiments presented were performed. We would also like to acknowledge the Air Force Office of Scientific Research (AFOSR) for their continued support of this research under award number #FA9550-09-1-0701. M. Guala worked on this project at the California Institute of Technology but is currently at the University of Minnesota.
Group:GALCIT
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-09-1-0701
Issue or Number:4
Record Number:CaltechAUTHORS:20111025-073430962
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20111025-073430962
Official Citation:A study of the three-dimensional spectral energy distribution in a zero pressure gradient turbulent boundary layer J. LeHew, M. Guala and B. J. McKeon
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:27392
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:25 Oct 2011 14:51
Last Modified:03 Oct 2019 03:23

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