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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

EVALUATION OF THERMAL PROPERTIES UNDER DYNAMIC CONDITIONS

Get access (open in a dialog) DOI: 10.1615/IHTC10.820
pages 391-396

Resumo

The method treated in this paper uses the complete solution to the conduction problem, including both transient and steady-state regimes, to determine thermal conductivity and diffusivity of solid materials. The method takes advantage of the thin film technology to measure heat flux and temperature dynamicaly at the surface of interest. The dual dynamic measurement at the surface frees the user of guaranteeing specific boundary conditions, such as constant heat input or constant temperature. As a non-invasive technique, there is no need to insert probes into the sample.The paper summarizes the theoretical model. covering the determination of diffusivity, conductivity and contact resistance. The method is applied to obtaining these parameters on saturated porous rocks. A brief report on the experimental procedure includes a description of the cell specially built for the experiments. Measurements and results are reported for three saturation conditions. In order to verify the accuracy of the method, the study incorporates an error analysis.