Rheological and thermal transport characteristics of a transformer oil based ferrofluid
(2018) In Acta Physica Polonica A 133(3). p.564-566- Abstract
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... (More)
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%.
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- author
- Paulovičová, K. ; Tóthová, J. ; Rajňák, M. ; Wu, Z. LU ; Sundén, B. LU ; Wadsö, L. LU ; Tobiáš, T. ; Kopčansky, P. ; Timko, M. and Lisý, V.
- organization
- publishing date
- 2018-03-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Acta Physica Polonica A
- volume
- 133
- issue
- 3
- pages
- 3 pages
- publisher
- Institute of Physics, Polish Academy of Sciences
- external identifiers
-
- scopus:85045153990
- ISSN
- 0587-4246
- DOI
- 10.12693/APhysPolA.133.564
- language
- English
- LU publication?
- yes
- id
- 75342840-74c3-4ea6-9110-4f076b7423a0
- date added to LUP
- 2018-04-20 14:53:48
- date last changed
- 2023-11-17 17:44:39
@article{75342840-74c3-4ea6-9110-4f076b7423a0, abstract = {{<p>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<sup>-1</sup> 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%.</p>}}, author = {{Paulovičová, K. and Tóthová, J. and Rajňák, M. and Wu, Z. and Sundén, B. and Wadsö, L. and Tobiáš, T. and Kopčansky, P. and Timko, M. and Lisý, V.}}, issn = {{0587-4246}}, language = {{eng}}, month = {{03}}, number = {{3}}, pages = {{564--566}}, publisher = {{Institute of Physics, Polish Academy of Sciences}}, series = {{Acta Physica Polonica A}}, title = {{Rheological and thermal transport characteristics of a transformer oil based ferrofluid}}, url = {{http://dx.doi.org/10.12693/APhysPolA.133.564}}, doi = {{10.12693/APhysPolA.133.564}}, volume = {{133}}, year = {{2018}}, }