Measurement of the Thermal Diffusivity of Liquids by the Forced Rayleigh Scattering Method (1st Report, Examination of the Method and Measurements on Some Liquids Including Toluene)

Takuya Hatakeyama, Kakujiro Kadoya, Masakazu Okuda, Yuji Nagasaka, Akira Nagashima

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A new apparatus to measure the thermal diffusivity of liquids based on the forced Rayleigh scattering method was developed. Verification of the theory and examination of error factors have been carried out through measurement of the thermal diffusivity of toluene and water. The error factors examined in the present study were; sample layer thickness, concentration of dye and heating pulse duration time. Through these considerations, appropriate experimental conditions for the measurement were determined. To demonstrate the applicability of this method, the thermal diffusivities of toluene, n-hexane and methanol have been measured at room temperature. The accuracy of the present measurement was estimated to be±3 %. The present study may lead to the conclusion that the forced Rayleigh scattering method has considerable potential of being applied to measurements for electrically conducting liquids at high temperature.

Original languageEnglish
Pages (from-to)1590-1597
Number of pages8
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Issue number489
Publication statusPublished - 1987 Jan 1



  • Forced Rayleigh Scattering Method
  • Optical Measurement
  • Thermal Diffusivity
  • Thermophysical Properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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