Fundamental study of thermal conduction in dry soils

Tae Sup Yun, J. C. Santamarina

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

The thermal conductivity of the different soil components-mineral, liquids and air-varies across two orders of magnitude. Two studies are implemented to explore the role of contacts in heat conduction in dry granular materials. The first set of experiments is designed to elucidate heat transfer at contacts, and it is complemented with a numerically based inversion analysis for different local and boundary conditions to extract proper material parameters. Then, the thermal conductivity of dry soils is measured at different packing densities to address the relevance of coordination number and particle shape effects. Together, both studies confirm the prevailing effect of contact quality and number of contacts per unite volume on heat conduction in granular materials. Interparticle contacts and the presence of liquids in pores play a critical role in heat transfer, and determine the ordered sequence of typical thermal conductivity values: k air < k dry-soil < k water < k saturated-soil < k mineral.

Original languageEnglish
Pages (from-to)197-207
Number of pages11
JournalGranular Matter
Volume10
Issue number3
DOIs
Publication statusPublished - 2008 Mar 1

Fingerprint

soils
Soils
conduction
Thermal conductivity
thermal conductivity
Granular materials
granular materials
Heat conduction
conductive heat transfer
Minerals
heat transfer
minerals
Heat transfer
packing density
air
Liquids
liquids
Air
coordination number
Contacts (fluid mechanics)

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)

Cite this

Yun, Tae Sup ; Santamarina, J. C. / Fundamental study of thermal conduction in dry soils. In: Granular Matter. 2008 ; Vol. 10, No. 3. pp. 197-207.
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Fundamental study of thermal conduction in dry soils. / Yun, Tae Sup; Santamarina, J. C.

In: Granular Matter, Vol. 10, No. 3, 01.03.2008, p. 197-207.

Research output: Contribution to journalArticle

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