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

Marcus Hultmark; Anand Ashok; Alexander J. Smits

doi:10.1088/0957-0233/22/5/055401

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

Marcus Hultmark, Anand Ashok, Alexander J. Smits

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The effect of end conduction on constant temperature hot-wire anemometry was studied. A new parameter, Γ = (ℓ/d)√4a(k_f/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 language	English (US)
Article number	055401
Journal	Measurement Science and Technology
Volume	22
Issue number	5
DOIs	https://doi.org/10.1088/0957-0233/22/5/055401
State	Published - May 2011

All Science Journal Classification (ASJC) codes

Instrumentation
Engineering (miscellaneous)
Applied Mathematics

Keywords

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

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10.1088/0957-0233/22/5/055401

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abstract = "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.",

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AU - Ashok, Anand

AU - Smits, Alexander J.

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AB - 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.

KW - Hot wire

KW - anemometer

KW - end-conduction effects

KW - length-to-diameter ratio

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

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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