The objective of this work is to improve measurements of transport properties using the hot disk thermal constants analyzer. The principle of this method is based on the transient heating of a plane double spiral sandwiched between two pieces of the investigated material. From the temperature increase of the heat source, it is possible to derive both the thermal conductivity and the thermal diffusivity from one single transient recording, provided the total time of the measurement is chosen within a correct time window defined by the theory and the experimental situation. Based on a theory of sensitivity coefficients, it is demonstrated how the experimental time window should be selected under different experimental situations. In addition to the theoretical work, measurements on two different materials: poly(methylmethacrylate) and Stainless Steel A 310, with thermal conductivity of 0.2 and 14 W/mK, respectively, have been performed and analyzed based on the developed theory.
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June 2000
Research Article|
June 01 2000
Parameter estimations for measurements of thermal transport properties with the hot disk thermal constants analyzer
Vlastimil Bohac;
Vlastimil Bohac
Institute of Physics, Slovak Academy of Science, Bratislava, Slovak Republic
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Mattias K. Gustavsson;
Mattias K. Gustavsson
Department of Thermo and Fluid Dynamics, Chalmers University of Technology, Gothenburg, Sweden
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Ludovit Kubicar;
Ludovit Kubicar
Institute of Physics, Slovak Academy of Science, Bratislava, Slovak Republic
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Silas E. Gustafsson
Silas E. Gustafsson
Department of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
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Rev. Sci. Instrum. 71, 2452–2455 (2000)
Article history
Received:
November 16 1999
Accepted:
February 23 2000
Citation
Vlastimil Bohac, Mattias K. Gustavsson, Ludovit Kubicar, Silas E. Gustafsson; Parameter estimations for measurements of thermal transport properties with the hot disk thermal constants analyzer. Rev. Sci. Instrum. 1 June 2000; 71 (6): 2452–2455. https://doi.org/10.1063/1.1150635
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