Measurement of the thermal diffusivity of molten KCl up to 1000°C by the forced Rayleigh scattering method

Yuji Nagasaka, A. Nagashima

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

This paper describes measurement of the thermal diffusivity of molten KCl in the temperature range from 804 to 1030°C by the forced Rayleigh scattering method. In this contact-free optical measuring technique for the thermal diffusivity of liquids, a sample needs to be colored by the admixture of a dye for suitable absorption of a heating laser beam. The dye substances employed are CoCl2 and NiCl2, which were chosen through the experimental evaluation. The accuracy is estimated to be ±7% for molten KCl colored with NiCl2. The results converted to thermal conductivity show one of the smallest values among other previous data; the difference is a factor of four. The present study demonstrates the promising applicability of the forced Rayleigh scattering method to the measurement of high-temperature molten salts, which has never be attained by other conventional methods.

Original languageEnglish
Pages (from-to)923-931
Number of pages9
JournalInternational Journal of Thermophysics
Volume9
Issue number6
DOIs
Publication statusPublished - 1988 Nov

Fingerprint

Rayleigh scattering
Thermal diffusivity
thermal diffusivity
Molten materials
Coloring Agents
Dyes
dyes
molten salts
admixtures
Laser beams
Thermal conductivity
thermal conductivity
Salts
laser beams
Heating
Temperature
heating
evaluation
Liquids
liquids

Keywords

  • forced Rayleigh scattering method
  • high temperature
  • KCl
  • molten salts
  • thermal conductivity
  • thermal diffusivity

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Mechanics of Materials
  • Computational Mechanics
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Cite this

Measurement of the thermal diffusivity of molten KCl up to 1000°C by the forced Rayleigh scattering method. / Nagasaka, Yuji; Nagashima, A.

In: International Journal of Thermophysics, Vol. 9, No. 6, 11.1988, p. 923-931.

Research output: Contribution to journalArticle

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