Abstract
As a series of experimental determinations of the thermal diffusivity of molten alkali halides, this paper describes measurements on five molten alkali metal chlorides (LiCl, NaCl, KCl, RbCl, and CsCl) in the temperature range up to 1440 K by the forced Rayleigh scattering method. K2Cr2O7 is employed as a dye substance to color the transparent molten salts. The accuracy is 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 steady-state methods show larger values, up to about five times, which may be due to the systematic error caused by the presence of convection and radiation. It is found that the thermal conductivity of these series of molten alkali metal chlorides decreases with increasing molecular weight, and their temperature coefficients are weakly negative.
| Original language | English |
|---|---|
| Pages (from-to) | 555-574 |
| Number of pages | 20 |
| Journal | International Journal of Thermophysics |
| Volume | 13 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1992 Jul |
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Keywords
- alkali halides
- forced Rayleigh scattering method
- 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
Experimental determination of the thermal diffusivity of molten alkali halides by the forced Rayleigh scattering method. I. Molten LiCl, NaCl, KCl, RbCl, and CsCl. / Nagasaka, Yuji; Nakazawa, N.; Nagashima, A.
In: International Journal of Thermophysics, Vol. 13, No. 4, 07.1992, p. 555-574.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Experimental determination of the thermal diffusivity of molten alkali halides by the forced Rayleigh scattering method. I. Molten LiCl, NaCl, KCl, RbCl, and CsCl
AU - Nagasaka, Yuji
AU - Nakazawa, N.
AU - Nagashima, A.
PY - 1992/7
Y1 - 1992/7
N2 - As a series of experimental determinations of the thermal diffusivity of molten alkali halides, this paper describes measurements on five molten alkali metal chlorides (LiCl, NaCl, KCl, RbCl, and CsCl) in the temperature range up to 1440 K by the forced Rayleigh scattering method. K2Cr2O7 is employed as a dye substance to color the transparent molten salts. The accuracy is 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 steady-state methods show larger values, up to about five times, which may be due to the systematic error caused by the presence of convection and radiation. It is found that the thermal conductivity of these series of molten alkali metal chlorides decreases with increasing molecular weight, and their temperature coefficients are weakly negative.
AB - As a series of experimental determinations of the thermal diffusivity of molten alkali halides, this paper describes measurements on five molten alkali metal chlorides (LiCl, NaCl, KCl, RbCl, and CsCl) in the temperature range up to 1440 K by the forced Rayleigh scattering method. K2Cr2O7 is employed as a dye substance to color the transparent molten salts. The accuracy is 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 steady-state methods show larger values, up to about five times, which may be due to the systematic error caused by the presence of convection and radiation. It is found that the thermal conductivity of these series of molten alkali metal chlorides decreases with increasing molecular weight, and their temperature coefficients are weakly negative.
KW - alkali halides
KW - forced Rayleigh scattering method
KW - molten salts
KW - thermal conductivity
KW - thermal diffusivity
UR - http://www.scopus.com/inward/record.url?scp=0000671961&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000671961&partnerID=8YFLogxK
U2 - 10.1007/BF00501941
DO - 10.1007/BF00501941
M3 - Article
AN - SCOPUS:0000671961
VL - 13
SP - 555
EP - 574
JO - International Journal of Thermophysics
JF - International Journal of Thermophysics
SN - 0195-928X
IS - 4
ER -