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Mesure interférométrique de l'amélioration du transfert de chaleur par écoulement magnétohydrodynamique avec plaque de gadolinium magnétisée.

Interferometric measurement of the heat transfer enhancement driven by a magnetohydrodynamic flow at a magnetized gadolinium plate.

Numéro : pap. n. 890

Auteurs : LEI Z., ECKERT K.

Résumé

A Mach-Zehnder (M-Z) interferometer is applied to study the temperature field in a fluid at a periodically magnetized gadolinium (Gd) plate during magnetization stage. N-decane is used for the reference case, pure thermal diffusion, because of its high refractive index change with temperature. In a second class of experiments, a 0.5 M NaOH solution is used as heat transfer fluid. By means of injecting an electric current ranging from 1 mA to 3 mA into the alkaline solution during the magnetization stage, a magnetohydrodynamic flow is generated. We find that this flow provides an enhancement of the energy exchange between the Gd plate and the fluid which is about 30% for a Reynold number of ca. 15.3. Besides, the enhancement is increased quasi-linearly with the Reynold number in present setup.

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Pages : 7 p.

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Détails

  • Titre original : Interferometric measurement of the heat transfer enhancement driven by a magnetohydrodynamic flow at a magnetized gadolinium plate.
  • Identifiant de la fiche : 30015148
  • Langues : Anglais
  • Source : Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Date d'édition : 16/08/2015
  • DOI : http://dx.doi.org/10.18462/iir.icr.2015.0890

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