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

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 set...

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Bibliographic Details
Published inExperiments in fluids Vol. 56; no. 7
Main Authors Williams, Owen, Van Buren, Tyler, Smits, Alexander J.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2015
Subjects
Engineering
Engineering Fluid Dynamics
Engineering Thermodynamics
Extreme Flow Workshop 2014
Fluid- and Aerodynamics
Heat and Mass Transfer
Research Article
Turbulent Prandtl number
PIV
NSTAP
Cold-wires
Turbulent heat flux
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Summary: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.
ISSN:0723-4864
1432-1114
DOI:10.1007/s00348-015-2008-5