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Micronic-size cryogenic thermometer for turbulence measurements.

Author(s) : CHANAL O., BAGUENARD B., BETHOUX O., CHABAUD B.

Type of article: Article

Summary

Micronic-size thermometers designed for local measurements in turbulent gaseous helium in the range of 4-80 K, have been developed and tested. Their very short time response and micronic spatial resolution allow to perform measurements down to the Kolmogorov dissipative length scale, for high Reynolds or Rayleigh numbers flows. These thermometers, designed to be non-perturbative in the flow, are based on gold-germanium thin films deposited by sputtering process on drawn glass fibers. Their relative sensitivities are ranging from 0.15 to 0.9 and are nearly constant on the whole temperature range.

Details

  • Original title: Micronic-size cryogenic thermometer for turbulence measurements.
  • Record ID : 1998-2102
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 68 - n. 6
  • Publication date: 1997/06
  • Document available for consultation in the library of the IIR headquarters only.

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