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Characterizing the lower log region of the atmospheric surface layer via large-scale particle tracking velocimetry

Rosi, Giuseppe A. and Sherry, Michael and Kinzel, Matthias and Rival, David E. (2014) Characterizing the lower log region of the atmospheric surface layer via large-scale particle tracking velocimetry. Experiments in Fluids, 55 (5). Art. No. 1736. ISSN 0723-4864. https://resolver.caltech.edu/CaltechAUTHORS:20140630-091710086

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Abstract

As a first step toward characterizing coherent structures within the atmospheric surface layer (ASL), measurements obtained via a large-scale particle tracking velocimetry (LS-PTV) system were validated against wind-measurement station data as well as canonical turbulent boundary layer studies. The LS-PTV system resolves three-dimensional, Lagrangian tracks over a 16 m^3 volume. Mean-velocity measurements, as well as vertical and shear Reynolds-stress measurements, generally agreed with wind-measurement station data and Reynolds-stress profiles referenced from literature. The probability distributions for streamwise, spanwise and vertical velocity-fluctuation components appear normally distributed about zero. Furthermore, the probability distributions for all three components of Lagrangian acceleration were exponential and followed the parametrization curve from LaPorta et al. (Lett Nat 409:1017–1019, 2001). Lastly, the vorticity probability distributions were exponential and symmetric about zero, which matches findings from Balint et al. (Fluid Mech 228:53–86, 1991). The vorticity intensity measured by the LS-PTV system was less than values from Priyadarshana et al. (Fluid Mech 570:307–346, 2007), which is attributed to the low spatial resolution. However, the average spacing of 0.5 m between tracer particles is deemed sufficient for the future characterization of vortical structures within the ASL.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s00348-014-1736-2DOIArticle
http://link.springer.com/article/10.1007/s00348-014-1736-2PublisherArticle
Additional Information:© 2014 Springer-Verlag Berlin Heidelberg. Received: 2 February 2014. Revised: 1 April 2014. Accepted: 17 April 2014. Published online: 13 May 2014. The authors wish to thank Alberta Innovates Technology Futures for their financial backing. Thanks also go to Genivar Wind for their generous support in the development and operation of the wind mast. The authors also wish to thank Tyler Christensen and Mohamed Arif Mohamed for their assistance during data acquisition, and Dr. Masaki Hayashi for providing access to his eddy-covariance system.
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Funding AgencyGrant Number
Alberta Innovates Technology FuturesUNSPECIFIED
Genivar WindUNSPECIFIED
Issue or Number:5
Record Number:CaltechAUTHORS:20140630-091710086
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140630-091710086
Official Citation: Characterizing the lower log region of the atmospheric surface layer via large-scale particle tracking velocimetry Giuseppe A. Rosi, Michael Sherry, Matthias Kinzel, David E. Rival Article: 1736
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46566
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:30 Jun 2014 17:42
Last Modified:03 Oct 2019 06:45

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