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| Titel |
Thermal conductivity of unsaturated clay-rocks |
| VerfasserIn |
D. Jougnot, A. Revil |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 14, no. 1 ; Nr. 14, no. 1 (2010-01-18), S.91-98 |
| Datensatznummer |
250012148
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| Publikation (Nr.) |
 copernicus.org/hess-14-91-2010.pdf |
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| Zusammenfassung |
| The parameters used to describe the electrical conductivity of a
porous material can be used to describe also its thermal conductivity. A new
relationship is developed to connect the thermal conductivity of an
unsaturated porous material to the thermal conductivity of the different
phases of the composite, and two electrical parameters called the first and
second Archie's exponents. A good agreement is obtained between the new
model and thermal conductivity measurements performed using packs of glass
beads and core samples of the Callovo-Oxfordian clay-rocks at different
saturations of the water phase. We showed that the three model parameters
optimised to fit the new model against experimental data (namely the thermal
conductivity of the solid phase and the two Archie's exponents) are
consistent with independent estimates. We also observed that the anisotropy
of the effective thermal conductivity of the Callovo-Oxfordian clay-rock was
mainly due to the anisotropy of the thermal conductivity of the solid phase. |
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