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Thermal Conductivity of Unsaturated Soil: Equivalent Microstructure Approach
Abstract The aim of the paper is to adopt the equivalent microstructure approach, originally formulated for saturated soil with respect to thermal conductivity [1], to the case of unsaturated one (3-phase medium). For that purpose, we propose two methodologically different approaches within the framework of Mori-Tanaka homogenization scheme. The first one is based on the replacement of the 3-phase medium with a 2-phase one. In this case, thermal conductivity of the mixture of water and air is estimated using the Hashin-Shtrikman lower and upper bounds. The latter approach treats the soil as the 3-phase medium. This requires a deep reformulation of the equivalent microstructure approach introduced in [1]. The second approach is recognized as the proper one, providing the remarkable agreement between the measurements and predictions of thermal conductivities at whole range of saturation degrees.
Thermal Conductivity of Unsaturated Soil: Equivalent Microstructure Approach
Abstract The aim of the paper is to adopt the equivalent microstructure approach, originally formulated for saturated soil with respect to thermal conductivity [1], to the case of unsaturated one (3-phase medium). For that purpose, we propose two methodologically different approaches within the framework of Mori-Tanaka homogenization scheme. The first one is based on the replacement of the 3-phase medium with a 2-phase one. In this case, thermal conductivity of the mixture of water and air is estimated using the Hashin-Shtrikman lower and upper bounds. The latter approach treats the soil as the 3-phase medium. This requires a deep reformulation of the equivalent microstructure approach introduced in [1]. The second approach is recognized as the proper one, providing the remarkable agreement between the measurements and predictions of thermal conductivities at whole range of saturation degrees.
Thermal Conductivity of Unsaturated Soil: Equivalent Microstructure Approach
Łydżba, Dariusz (author) / Różański, Adrian (author) / Stefaniuk, Damian (author)
2018-01-01
5 pages
Article/Chapter (Book)
Electronic Resource
English
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