Constant Velocity Flying Spot for the estimation of in-plane thermal diffusivity on anisotropic materials
| Autor: | Christophe Pradere, Jean-Christophe Batsale, Arantza Mendioroz, Agustín Salazar, Jean-Luc Battaglia, Alberto Oleaga, Alain Sommier, J. González, L. Gaverina, M. Bensalem, A. Bedoya |
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| Přispěvatelé: | Transferts, écoulements, fluides, énergétique (TREFLE), Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS), Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), École Nationale Supérieure d'Arts et Métiers (ENSAM), HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Infrared 020209 energy Isotropy General Engineering 02 engineering and technology Condensed Matter Physics Thermal diffusivity Laser 01 natural sciences 010305 fluids & plasmas law.invention [SPI]Engineering Sciences [physics] Optics law 0103 physical sciences Thermography Thermal 0202 electrical engineering electronic engineering information engineering Thermal analysis Anisotropy business ComputingMilieux_MISCELLANEOUS |
| Zdroj: | International Journal of Thermal Sciences International Journal of Thermal Sciences, Elsevier, 2019, 145, pp.106000. ⟨10.1016/j.ijthermalsci.2019.106000⟩ |
| ISSN: | 1290-0729 |
| DOI: | 10.1016/j.ijthermalsci.2019.106000⟩ |
| Popis: | The Flying-Spot infrared thermography was introduced more than twenty years ago to detect narrow cracks. Recent progress made in optical control, lasers and infrared cameras allows extending the Flying-Spot technique for a quantitative thermal analysis. In this work, we propose a Constant Velocity Flying Spot to measure the in-plane thermal diffusivity of isotropic and anisotropic materials. We demonstrate that the logarithmic temperature profiles perpendicular to the laser motion are parabolic functions from which the thermal diffusivity along this direction is obtained. We have investigated two equivalent experimental configurations: (a) Moving laser with motionless sample and (b) moving sample with motionless laser spot. Both are of practical interest: the first one leads to identify thermal heterogeneities in macroscopic samples and the second one leads to measure the thermal properties of materials in in-line production processes. Measurements performed on calibrated samples (from insulators to good thermal conductors) with both configurations confirm the reliability of the method to measure the in-plane thermal diffusivity with an error less than 4%. |
| Databáze: | OpenAIRE |
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