A new criterion for end-conduction effects in hot-wire anemometry

Marcus Hultmark, Anand Ashok, Alexander J. Smits

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32 Scopus citations


The effect of end conduction on constant temperature hot-wire anemometry was studied. A new parameter, Γ = (ℓ/d)√4a(kf/k)Nu, is proposed to describe the significance of end conduction more comprehensively than the commonly used length-to-diameter ratio ℓ/d, in that it allows for material property variations, resistance ratio and Reynolds number effects. Numerical and experimental data are used to show that Γ improves the correlation of the attenuation of measured turbulence fluctuations, and it is found that Γ > 14 is required to avoid such effects.

Original languageEnglish (US)
Article number055401
JournalMeasurement Science and Technology
Issue number5
StatePublished - May 2011

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics


  • Hot wire
  • anemometer
  • end-conduction effects
  • length-to-diameter ratio


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