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2018 | 133 | 3 | 564-566
Article title

Rheological and Thermal Transport Characteristics of a Transformer Oil Based Ferrofluid

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EN
Abstracts
EN
Ferrofluids based on insulating liquids are intensively studied as a potential substitute of liquid dielectric in high voltage technologies. In this work we focus on the experimental investigation of flow and thermal transport characteristics of a ferrofluid based on transformer oil (Mogul) and iron oxide nanoparticles. The magneto-rheological behavior of the ferrofluid was studied by a rotational rheometer in the shear rate range from 1 to 1000 s¯¹ and magnetic field up to 1 T. By means of a thermal constants analyzer and a transient plane source method we obtained the thermal conductivity, specific heat and thermal diffusivity values for the studied oil and the ferrofluid. It is shown that the Newtonian character of the ferrofluid changes to a non-Newtonian with application of the magnetic field. The notable magneto-viscous effect has been observed especially at low shear rates. We found that the doping of the transformer oil by 3 wt% of the nanoparticles results in a thermal conductivity enhancement by about 3.2%.
Keywords
Contributors
  • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, Slovakia
author
  • Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, Košice, Slovakia
author
  • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, Slovakia
  • Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, Košice, Slovakia
author
  • Department of Energy Sciences, Lund University, 22100 Lund, Sweden
author
  • Department of Energy Sciences, Lund University, 22100 Lund, Sweden
author
  • Division of Building Materials, Lund University, 22100 Lund, Sweden
author
  • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, Slovakia
  • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, Slovakia
author
  • Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, Košice, Slovakia
author
  • Faculty of Electrical Engineering and Informatics, Technical University of Košice, Letná 9, Košice, Slovakia
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv133n3p071kz
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