Thermal effusivity investigations of solid materials by using the thermal-wave-resonator-cavity (TWRC) configuration. Theory and mathematical simulations |
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| Authors: | M. Streza M. N. Pop K. Kovacs V. Simon S. Longuemart D. Dadarlat |
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| Affiliation: | (1) National R&D Institute for Isotopic and Molecular Technologies, Cluj-Napoca, Donath Str. 65-103, 400293 Cluj-Napoca, Romania;(2) Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania;(3) Laboratoire de Thermophysique de la matière condensée (equipe UMR CNRS 8024), 145 Avenue Maurice Schumann, 59140 Dunkerque, France |
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| Abstract: | An alternative photopyroelectric (PPE) technique that combines the front detection configuration (FPPE) with the thermal-wave-resonator-cavity (TWRC) method is proposed. The theoretical analysis of the phase of the FPPE signal indicates that the configuration offers information about both fluid sample and backing material. The backing independent values of the normalized PPE phase give the possibility to calculate fluid’s thermal diffusivity. By monitoring the thickness of a fluid with well known properties, the thermal effusivity of a solid sample (backing material) can be measured. |
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