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A new method for measuring turbulent heat fluxes using PIV and fast-response cold-wires

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Abstract

A new method for measuring turbulent heat fluxes using a combination of particle image velocimetry and a nanoscale fast-response cold-wire is tested by examining a rough-wall turbulent boundary layer subject to weakly stable stratification. The method has the advantages of simple calibration and setup, as well as providing spatial correlations of velocity and temperature and their associated integral length scales. The accuracy of using Taylor’s hypothesis when employing a large field of view is investigated. Heat flux, velocity–temperature correlation coefficients and turbulent Prandtl number profiles, as well as spatial velocity and temperature correlations, are presented.

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Acknowledgments

This work was supported by the Cooperative Institute for Climate Science (CICS) at Princeton University. We would also like to thank Yuyang Fan, Gilad Arwatz and Marcus Hultmark who provided the T-NSTAP used in this study.

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Authors and Affiliations

  1. Princeton University, Princeton, NJ, 08544, USA

    Owen Williams, Tyler Van Buren & Alexander J. Smits

  2. Monash University, Melbourne, Australia

    Alexander J. Smits

Authors
  1. Owen Williams
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  2. Tyler Van Buren
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  3. Alexander J. Smits
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Corresponding author

Correspondence to Owen Williams.

Additional information

This article belongs to a Topical Collection of articles entitled Extreme Flow Workshop 2014. Guest editors: I. Marusic and B. J. McKeon.

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Williams, O., Van Buren, T. & Smits, A.J. A new method for measuring turbulent heat fluxes using PIV and fast-response cold-wires. Exp Fluids 56, 142 (2015). https://doi.org/10.1007/s00348-015-2008-5

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  • DOI: https://doi.org/10.1007/s00348-015-2008-5

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