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

Owen Williams, Tyler Van Buren, Alexander Smits

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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.

Original languageEnglish (US)
Article number142
JournalExperiments in Fluids
Volume56
Issue number7
DOIs
StatePublished - Jul 27 2015

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Keywords

  • Cold-wires
  • NSTAP
  • PIV
  • Turbulent Prandtl number
  • Turbulent heat flux

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