Thermal diffusivity measurement in slabs using harmonic and one-dimensional propagation of thermal waves (Articolo in rivista)

Type
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  • Thermal diffusivity measurement in slabs using harmonic and one-dimensional propagation of thermal waves (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.ijthermalsci.2003.10.005 (literal)
Alternative label
  • Alberto Muscio; Paolo G. Bison; Sergio Marinetti; Ermanno Grinzato (2004)
    Thermal diffusivity measurement in slabs using harmonic and one-dimensional propagation of thermal waves
    in International journal of thermal sciences; Academic Press Elsevier, Amsterdam (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Alberto Muscio; Paolo G. Bison; Sergio Marinetti; Ermanno Grinzato (literal)
Pagina inizio
  • 453 (literal)
Pagina fine
  • 463 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S1290072903001650 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 43 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 5 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1 : DIMeC--Dipartimento di Ingegneria Meccanica e Civile, Università di Modena e Reggio Emilia, Via Vignolese, 905/B, 41100 Modena, Italy 2-4 : CNR-ITC Padova section, Corso Stati Uniti, 4, 35127 Padova, Italy (literal)
Titolo
  • Thermal diffusivity measurement in slabs using harmonic and one-dimensional propagation of thermal waves (literal)
Abstract
  • The development of a novel approach to the well-known Ångström's method for the measurement of the thermal diffusivity is reported. In this method, the diffusivity is determined from the damping and the phase shift of a periodic thermal signal during its propagation along the specimen. The propagation can be easily monitored by infrared thermography. In general, a non-contact source is used to apply the signal. In the present work, however, a direct-contact source is employed, with a temperature-oscillation signal supplied on a portion of one of the two main surfaces of the specimen, where a homogeneous contact can be yielded by using a proper contact pressure. Such practice implies that the measures of surface temperature can be used to estimate the diffusivity only beyond a certain distance from the source, where the wave-front of the temperature oscillation within the specimen becomes plane and perpendicular to the main surfaces. This distance is investigated here, to establish a general rule for the performance of the experiments. A thermoelectric device based on the Peltier effect is employed as the thermal source. The main difficulty about its use is to obtain a perfectly harmonic and well-balanced thermal signal. This is necessary to avoid a complex processing of the experimental data, and it can be achieved by supplying a current with a properly-chosen time-evolution pattern. Such an approach, which is built upon previous work, is here enhanced by improving the underlying analytical model. (literal)
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