Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

New Estimation Method Based on Integral Transforms for the Thermal Diffusivity Measurement of Anisotropic Materials

Get access (open in a dialog) DOI: 10.1615/IHTC15.min.008990
pages 4945-4959

Abstrakt

In this paper, a new method for thermal characterization of anisotropic materials taking into account the thermal coupling between the sample and its holder is presented. The originality of this work is to use temperature measurements performed by infrared camera on the edges of the sample and introduce them as boundary conditions to get rid of the presence of the sample holder. Using the principle of superposition and adapted integral transforms, it is then possible by an iterative method to obtain simultaneously the material properties in its different anisotropy directions by a least squares method applied to all the spatial harmonics of the temperature field at the same time. This method is validated and compared with a classical Fourier-Cosine transform through a simulation before being applied in experimental measurements. This method is also very interesting because it can be extended for the measurement of the thermal diffusivity on a studying zone smaller than the sample sizes of the sample for high or low conductive materials by working either with the front or rear faces temperature fields of the samples.