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Experimental investigation on convective heat transfer of ferrofluids inside a pipe under various magnet orientations

Wang, Jin LU ; Li, Guolong; Zhu, Hengxuan; Luo, Jing and Sundén, Bengt LU (2019) In International Journal of Heat and Mass Transfer 132. p.407-419
Abstract

Some experimental tests were conducted to reveal the enhancement of the ferrofluid heat transfer under a permanent magnetic field. This research aims to investigate the effect of various external magnetic fields on convective heat transfer characteristics of the ferrofluid (magnetic nanofluid). Comparison of theoretical predictions and experimental data were conducted to validate the rationality of the test results, and a good agreement with less than 10% deviations was found. The deviations from experimental data decrease with an increase of the Reynolds number (Re) from 391 to 805. Results from the case with 5 cannulas indicate that a continuous increase in the magnetic flux density (by increasing the quantity of the magnets) can... (More)

Some experimental tests were conducted to reveal the enhancement of the ferrofluid heat transfer under a permanent magnetic field. This research aims to investigate the effect of various external magnetic fields on convective heat transfer characteristics of the ferrofluid (magnetic nanofluid). Comparison of theoretical predictions and experimental data were conducted to validate the rationality of the test results, and a good agreement with less than 10% deviations was found. The deviations from experimental data decrease with an increase of the Reynolds number (Re) from 391 to 805. Results from the case with 5 cannulas indicate that a continuous increase in the magnetic flux density (by increasing the quantity of the magnets) can improve the heat transfer enhancement significantly. The ferrofluids with a magnetic cannula shows heat transfer enhancements of 26.5% and 54.5% at Re = 391 and 805, respectively.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cannula, Ferrofluid, Heat transfer enhancement, Magnetic flux density, Magnetic nanofluid
in
International Journal of Heat and Mass Transfer
volume
132
pages
13 pages
publisher
Pergamon
external identifiers
  • scopus:85058064303
ISSN
0017-9310
DOI
10.1016/j.ijheatmasstransfer.2018.12.023
language
English
LU publication?
yes
id
153e595c-c9b0-45ab-853f-115d0c137c2e
date added to LUP
2018-12-17 13:12:31
date last changed
2019-03-10 04:51:47
@article{153e595c-c9b0-45ab-853f-115d0c137c2e,
  abstract     = {<p>Some experimental tests were conducted to reveal the enhancement of the ferrofluid heat transfer under a permanent magnetic field. This research aims to investigate the effect of various external magnetic fields on convective heat transfer characteristics of the ferrofluid (magnetic nanofluid). Comparison of theoretical predictions and experimental data were conducted to validate the rationality of the test results, and a good agreement with less than 10% deviations was found. The deviations from experimental data decrease with an increase of the Reynolds number (Re) from 391 to 805. Results from the case with 5 cannulas indicate that a continuous increase in the magnetic flux density (by increasing the quantity of the magnets) can improve the heat transfer enhancement significantly. The ferrofluids with a magnetic cannula shows heat transfer enhancements of 26.5% and 54.5% at Re = 391 and 805, respectively.</p>},
  author       = {Wang, Jin and Li, Guolong and Zhu, Hengxuan and Luo, Jing and Sundén, Bengt},
  issn         = {0017-9310},
  keyword      = {Cannula,Ferrofluid,Heat transfer enhancement,Magnetic flux density,Magnetic nanofluid},
  language     = {eng},
  pages        = {407--419},
  publisher    = {Pergamon},
  series       = {International Journal of Heat and Mass Transfer},
  title        = {Experimental investigation on convective heat transfer of ferrofluids inside a pipe under various magnet orientations},
  url          = {http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.12.023},
  volume       = {132},
  year         = {2019},
}