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Effect of magnetic field on thermal conductivity and viscosity of a magnetic nanofluid loaded with carbon nanotubes

Shahsavar, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s12206-016-0135-4
  3. Publisher: Korean Society of Mechanical Engineers
  4. Abstract:
  5. The present work examines experimentally the effect of magnetic field on the viscosity and thermal conductivity of a hybrid nanofluid containing tetramethylammonium hydroxide (TMAH) coated Fe3O4 nanoparticles and Gum arabic (GA) coated carbon nanotubes (CNTs). The hybrid nanofluid was prepared by using ultrasonic dispersion method. Magnetic field was created by a pair of spaced apart magnet plates. The effect of temperature on the time variation of thermal conductivity under applied magnetic field was also investigated. According to the results of this study, viscosity of the hybrid nanofluid increases with the strength of magnetic field, while it decreases with the increase of temperature. Additionally, it is found that the hybrid nanofluid behaves as a shear thinning fluid at low shear rates while it exhibits Newtonian behavior at high shear rates. Furthermore, results show that when an external magnetic field is applied to the studied magnetic nanofluids, the thermal conductivity experiences a peak
  6. Keywords:
  7. Ferrofluid ; Carbon ; Carbon nanotubes ; Magnetic fields ; Magnetic fluids ; Magnetism ; Nanomagnetics ; Nanoparticles ; Nanotubes ; Shear deformation ; Shear thinning ; Thermal conductivity ; Thermal conductivity of liquids ; Viscosity ; Yarn ; Applied magnetic fields ; Effect of magnetic field ; Effect of temperature ; External magnetic field ; Magnetic nanofluid ; Newtonian behavior ; Shear thinning fluids ; Tetramethyl ammonium hydroxide ; Nanofluidics
  8. Source: Journal of Mechanical Science and Technology ; Volume 30, Issue 2 , 2016 , Pages 809-815 ; 1738494X (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s12206-016-0135-4