ISSN Online: 2377-424X
ISBN Print: 0-85295-345-3
International Heat Transfer Conference 10
EVALUATION OF THERMAL PROPERTIES UNDER DYNAMIC CONDITIONS
Abstract
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.