Measurement of the thermal diffusivity of molten salts by the forced Rayleigh scattering method

Naoki Nakazawa, Yuji Nagasaka, Akira Nagashima

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Measurements were made of the thermal diffusivity of five molten alkali metal chlorides (LiCl, NaCl, KCl, RbCl, and CsCl) in the temperature range above 1000 °C by the forced Rayleigh scattering method. K2Cr2O7 was used as the dye substance in order to colour the transparent molten salts. The accuracy was estimated to be ±4% to ±11%, depending on the measured salts. In comparison with the present results converted into thermal conductivity, most of the previous experimental data obtained by the steady-state methods show values up to about five times larger, which may be due to the presence of convection and radiation. It was found that the thermal conductivity of this series of molten alkali metal chlorides decreases with increasing molecular weight, and that this temperature coefficients are weakly negative.

Original languageEnglish
Pages (from-to)595-604
Number of pages10
JournalHigh Temperatures - High Pressures
Volume23
Issue number5
Publication statusPublished - 1991

Fingerprint

Rayleigh scattering
Thermal diffusivity
molten salts
thermal diffusivity
alkali metals
Alkali Metals
Molten materials
thermal conductivity
Salts
chlorides
Alkali metals
Chlorides
Thermal conductivity
Potassium Dichromate
molecular weight
convection
dyes
salts
color
temperature

ASJC Scopus subject areas

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

Cite this

Measurement of the thermal diffusivity of molten salts by the forced Rayleigh scattering method. / Nakazawa, Naoki; Nagasaka, Yuji; Nagashima, Akira.

In: High Temperatures - High Pressures, Vol. 23, No. 5, 1991, p. 595-604.

Research output: Contribution to journalArticle

@article{29fc8ccfe0474d76a5cc26b3469c7f16,
title = "Measurement of the thermal diffusivity of molten salts by the forced Rayleigh scattering method",
abstract = "Measurements were made of the thermal diffusivity of five molten alkali metal chlorides (LiCl, NaCl, KCl, RbCl, and CsCl) in the temperature range above 1000 °C by the forced Rayleigh scattering method. K2Cr2O7 was used as the dye substance in order to colour the transparent molten salts. The accuracy was estimated to be ±4{\%} to ±11{\%}, depending on the measured salts. In comparison with the present results converted into thermal conductivity, most of the previous experimental data obtained by the steady-state methods show values up to about five times larger, which may be due to the presence of convection and radiation. It was found that the thermal conductivity of this series of molten alkali metal chlorides decreases with increasing molecular weight, and that this temperature coefficients are weakly negative.",
author = "Naoki Nakazawa and Yuji Nagasaka and Akira Nagashima",
year = "1991",
language = "English",
volume = "23",
pages = "595--604",
journal = "High Temperatures - High Pressures",
issn = "0018-1544",
publisher = "Old City Publishing",
number = "5",

}

TY - JOUR

T1 - Measurement of the thermal diffusivity of molten salts by the forced Rayleigh scattering method

AU - Nakazawa, Naoki

AU - Nagasaka, Yuji

AU - Nagashima, Akira

PY - 1991

Y1 - 1991

N2 - Measurements were made of the thermal diffusivity of five molten alkali metal chlorides (LiCl, NaCl, KCl, RbCl, and CsCl) in the temperature range above 1000 °C by the forced Rayleigh scattering method. K2Cr2O7 was used as the dye substance in order to colour the transparent molten salts. The accuracy was estimated to be ±4% to ±11%, depending on the measured salts. In comparison with the present results converted into thermal conductivity, most of the previous experimental data obtained by the steady-state methods show values up to about five times larger, which may be due to the presence of convection and radiation. It was found that the thermal conductivity of this series of molten alkali metal chlorides decreases with increasing molecular weight, and that this temperature coefficients are weakly negative.

AB - Measurements were made of the thermal diffusivity of five molten alkali metal chlorides (LiCl, NaCl, KCl, RbCl, and CsCl) in the temperature range above 1000 °C by the forced Rayleigh scattering method. K2Cr2O7 was used as the dye substance in order to colour the transparent molten salts. The accuracy was estimated to be ±4% to ±11%, depending on the measured salts. In comparison with the present results converted into thermal conductivity, most of the previous experimental data obtained by the steady-state methods show values up to about five times larger, which may be due to the presence of convection and radiation. It was found that the thermal conductivity of this series of molten alkali metal chlorides decreases with increasing molecular weight, and that this temperature coefficients are weakly negative.

UR - http://www.scopus.com/inward/record.url?scp=0026283489&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026283489&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0026283489

VL - 23

SP - 595

EP - 604

JO - High Temperatures - High Pressures

JF - High Temperatures - High Pressures

SN - 0018-1544

IS - 5

ER -