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ISSN Online: 2377-424X

International Heat Transfer Conference 3
August, 7-12, 1966, Chicago, USA

PROBE CONSTANT FOR IN-SITU DETERMINATION OF THERMAL CONDUCTIVITIES OF SOILS

Get access (open in a dialog) DOI: 10.1615/IHTC3.200
pages 81-88

Abstract

In using a heated probe of finite diameter for the in-situ determination of thermal conductivities of soils, the theory of line heat source can not be directly applied. Consequently, the energy equation must be modified. The probe actually replaces a small core of the specimen. A method has been found to compensate for the difference in heat dissipation between the instrument and the displaced core. Each probe is given a constant for a specific range of thermal conductivity and moisture content. By inserting the constant in the equation for the line heat source, accurate results have been obtained.