期刊
INTERNATIONAL JOURNAL OF GEOMECHANICS
卷 13, 期 1, 页码 57-64出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GM.1943-5622.0000165
关键词
Thermal conductivity; Granular soils; Discrete element method
In this study, a simple idealization of heat transfer by conduction at the interparticle contacts is utilized for the evaluation of thermal conductivity of granular soils when subjected to external loading conditions. Discrete element method simulations employing this idealization were performed to examine the impact of loading the soil in a consolidated drained triaxial test environment on soil thermal conductivity. Results of conducted simulations show that shear-induced anisotropy results in an anisotropic thermal conductivity tensor. The results also indicate that contact density affects the average thermal conductivity of granular materials. The larger the average number of contacts per particle, or the coordination number, the larger the thermal conductivity. During shearing, the coordination number tends to decrease, resulting in a reduction in soil thermal conductivity with dense soils, showing a larger decrease in thermal conductivity upon shearing. (C) 2013 American Society of Civil Engineers.
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