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Caractérisation de la technique d'oscillation de la température pour mesurer la conductivité thermique de fluides.

Characterization of the temperature oscillation technique to measure the thermal conductivity of fluids.

Auteurs : BHATTACHARYA P., NARA S., VIJAYAN P., et al.

Type d'article : Article

Résumé

The temperature oscillation technique to measure the thermal diffusivity of a fluid consists of filling a cylindrical volume with the fluid, applying an oscillating temperature boundary condition at the two ends of the cylinder, measuring the amplitude and phase of the temperature oscillation at any point inside the cylinder, and finally calculating the fluid thermal diffusivity from the amplitude and phase values of the temperature oscillations at the ends and at the point inside the cylinder. Although this experimental technique was introduced by Santucci and co-workers nearly two decades ago, its application is still limited, perhaps because of the perceived difficulties in obtaining accurate results. Here, the authors attempt to clarify this approach by first estimating the maximum size of the liquid's cylindrical volume, performing a systematic series of experiments to find the allowable amplitude and frequency of the imposed temperature oscillations, and then validating our experimental setup and the characterization method by measuring the thermal conductivity of pure water at different temperatures and comparing our results with previously published work. [Reprinted with permission from Elsevier. Copyright, 2006].

Détails

  • Titre original : Characterization of the temperature oscillation technique to measure the thermal conductivity of fluids.
  • Identifiant de la fiche : 2007-0100
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 49 - n. 17-18
  • Date d'édition : 08/2006

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