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Document IIF

Effets simultanés de nanotubes de carbone à parois multiples et de nanoparticules d’oxyde de cuivre sur le comportement rhéologique de l’huile de refroidissement: application aux systèmes frigorifiques.

Simultaneous effects of multi-walled carbon nanotubes and copper oxide nanoparticles on the rheological behavior of cooling oil: application for refrigeration systems.

Auteurs : ESFE M. H., DALIR R., BAKHTIARI R., et al.

Type d'article : Article, Article de la RIF

Résumé

This study discussed the rheological behavior of MWCNT-CuO(30–70%)/SAE50 nanofluid experimentally at the volume fractions of 0–1 percent in the temperature range of 25–50 °C and the shear rate of 666–7998 s -1 . Due to a nonlinear relationship between the shear rate and shear stress, nanofluid behavior can be considered close to the non-Newtonian fluids. Nanofluid viscosity reduces by adding nanoparticles at the volume fractions of 0.0625%, 0.125%, and 0.25% (maximum reduction of 15%). Nanofluid viscosity increases at the volume fractions higher than 0.5%, as the maximum viscosity increase, i.e. 14%, occurs at the volume fraction of 1%. Reduction of viscosity at low volume fractions and a small increase of vis- cosity at higher volume fractions show that this nanofluid can be used in the applications other than lubrication. This study presents for the first time a new mathematical relation for the relative viscos- ity of MWCNT-CuO(3–70%)/SAE50. In the relation provided to predict the relative viscosity of nanofluid, R 2 = 0.9453, which indicates its accuracy. This study also discussed the sensitivity of the relative viscosity of nanofluid to temperature and volume fraction.

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Pages : 123-133

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Détails

  • Titre original : Simultaneous effects of multi-walled carbon nanotubes and copper oxide nanoparticles on the rheological behavior of cooling oil: application for refrigeration systems.
  • Identifiant de la fiche : 30026572
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 104
  • Date d'édition : 08/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2018.11.036

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