Thermal conductivity measurements of particulate materials 1. A review

Marsha A. Presley, Philip Christensen

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

Discussion of the thermal conductivity of particulate materials is dispersed over several decades and a wide range of disciplines. In addition, there is some disparity among the reported values. This paper presents a review of the methodology available for the study of thermal conductivity of particulate materials, with an emphasis on low atmospheric pressures, and an assessment of the dependability of the data previously reported. Both steady state and nonsteady state methods of thermal conductivity measurement are reviewed, delineating the advantages, disadvantages, and sources of error for each. Nonsteady state methods generally are simpler and more efficient. The transient hot wire and differentiated line-heat source are the preferred methods for the laboratory. These methods are better suited for small samples and short measurement times and are therefore the best methods to use for a series of comprehensive studies. Results of previous studies are presented, compared, and evaluated. A good way to assess the relative accuracy is to compare the values of thermal conductivity versus atmospheric pressure obtained from several experimenters. The lowest values of thermal conductivity at vacuum and very low atmospheric pressure, and the steepest slopes on the thermal conductivity versus atmospheric pressure curves, are indicative of the most accurate data. Previous thermal conductivity studies have shown that the thermal conductivity of particulate materials increases with increasing atmospheric pressure, with increasing particle size, and with increasing bulk density of the material. At vacuum, the thermal conductivity of particulate materials is proportional to the cube of the temperature. The temperature dependence of thermal conductivity is much less obvious at higher atmospheric pressures.

Original languageEnglish (US)
Article number96JE03302
Pages (from-to)6535-6549
Number of pages15
JournalJournal of Geophysical Research E: Planets
Volume102
Issue numberE3
StatePublished - 1997

Fingerprint

thermal conductivity
particulates
Thermal conductivity
atmospheric pressure
Atmospheric pressure
low pressure
material
Vacuum
vacuum
heat source
heat sources
Time measurement
bulk density
temperature
Particle size
time measurement
particle size
method
wire
Wire

Keywords

  • Energetics
  • Ion/molecule reaction
  • MIKES
  • Proton transfer
  • Rate coefficient
  • Reaction pathways

ASJC Scopus subject areas

  • Oceanography
  • Astronomy and Astrophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Thermal conductivity measurements of particulate materials 1. A review. / Presley, Marsha A.; Christensen, Philip.

In: Journal of Geophysical Research E: Planets, Vol. 102, No. E3, 96JE03302, 1997, p. 6535-6549.

Research output: Contribution to journalArticle

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