TWIN TRANSIENT-STATE CYLINDRICAL-PROBE METHOD FOR THE DETERMINATION OF THE THERMAL CONDUCTIVITY OF SOIL
- 1 November 1977
- journal article
- research article
- Published by Wolters Kluwer Health in Soil Science
- Vol. 124 (5) , 255-258
- https://doi.org/10.1097/00010694-197711000-00001
Abstract
The twin transient-state cylindrical-probe method was investigated to determine the thermal conductivity of soil. The apparatus [adaptable to field and laboratory] consists of the same 2 probes, which are made of stainless steel pipe, into which heating wire and a thermocouple are placed. One probe is introduced into the standard material (1% agar solution) and the other to the measuring material. An electric current is passed through the heating wires of both probes for about 40 s. Changes in the temperature of the probes are recorded with an X-Y recorder. The locus of the X-Y recorder is a straight line, and the tangent of the line is the ratio of the thermal conductivity of the 2 materials. The thermal conductivity of soil can be measured directly from the tangent with high accuracy.This publication has 1 reference indexed in Scilit:
- Ein instätionares verfahren zur messung der wärmeleitfähigkeit von flüssigkeiten und gasenInternational Journal of Heat and Mass Transfer, 1960