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Correct interpretation of nanofluid convective heat transfer

Buschmann, M. H. ; Azizian, R. ; Kempe, T. ; Juliá, J. E. ; Martínez-Cuenca, R. ; Sundén, B. LU ; Wu, Z. LU ; Seppälä, A. and Ala-Nissila, T. (2018) In International Journal of Thermal Sciences 129. p.504-531
Abstract

Engineers and scientist have a long tradition in trying to improve the thermophysical properties of convective heat carriers such as water and transformer oil. Technological developments of the last decades allow the dispersion of particle of sizes ranging between 10 and 100 nm in these liquids. In a large number of recent studies the resulting nanofluids have been reported to display anomalously high increase of convective heat transfer. The present study compiles experiments from five independent research teams investigating convective heat transfer in nanofluid flow in pipes, pipe with inserted twisted tape, annular counter flow heat exchanger, and coil and plate heat exchangers. The results of all these experiments unequivocally... (More)

Engineers and scientist have a long tradition in trying to improve the thermophysical properties of convective heat carriers such as water and transformer oil. Technological developments of the last decades allow the dispersion of particle of sizes ranging between 10 and 100 nm in these liquids. In a large number of recent studies the resulting nanofluids have been reported to display anomalously high increase of convective heat transfer. The present study compiles experiments from five independent research teams investigating convective heat transfer in nanofluid flow in pipes, pipe with inserted twisted tape, annular counter flow heat exchanger, and coil and plate heat exchangers. The results of all these experiments unequivocally confirm that Newtonian nanofluid flow can be consistently characterized by employing Nusselt number correlations obtained for single-phase heat transfer liquids such as water when the correct thermophysical properties of the nanofluid are utilized. It is also shown that the heat transfer enhancement provided by nanofluids equals the increase in the thermal conductivity of the nanofluid as compared to the base fluid independent of the nanoparticle concentration or material. These results demonstrate that no anomalous phenomena are involved in thermal conduction and forced convection based heat transfer of nanofluids. The experiments are theoretically supported by a fundamental similarity analysis of nanoparticle motion in nanofluid flow.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coil heat exchanger, Convective heat transfer, Counterflow heat exchanger, Newtonian nanofluids, Pipe, Plate heat exchanger, Twisted-tape
in
International Journal of Thermal Sciences
volume
129
pages
28 pages
publisher
Elsevier
external identifiers
  • scopus:85045460753
ISSN
1290-0729
DOI
10.1016/j.ijthermalsci.2017.11.003
language
English
LU publication?
yes
id
099cdda4-4d2b-4383-99a8-eb1ce781ccb6
date added to LUP
2018-04-23 12:55:29
date last changed
2020-04-02 01:54:18
@article{099cdda4-4d2b-4383-99a8-eb1ce781ccb6,
  abstract     = {<p>Engineers and scientist have a long tradition in trying to improve the thermophysical properties of convective heat carriers such as water and transformer oil. Technological developments of the last decades allow the dispersion of particle of sizes ranging between 10 and 100 nm in these liquids. In a large number of recent studies the resulting nanofluids have been reported to display anomalously high increase of convective heat transfer. The present study compiles experiments from five independent research teams investigating convective heat transfer in nanofluid flow in pipes, pipe with inserted twisted tape, annular counter flow heat exchanger, and coil and plate heat exchangers. The results of all these experiments unequivocally confirm that Newtonian nanofluid flow can be consistently characterized by employing Nusselt number correlations obtained for single-phase heat transfer liquids such as water when the correct thermophysical properties of the nanofluid are utilized. It is also shown that the heat transfer enhancement provided by nanofluids equals the increase in the thermal conductivity of the nanofluid as compared to the base fluid independent of the nanoparticle concentration or material. These results demonstrate that no anomalous phenomena are involved in thermal conduction and forced convection based heat transfer of nanofluids. The experiments are theoretically supported by a fundamental similarity analysis of nanoparticle motion in nanofluid flow.</p>},
  author       = {Buschmann, M. H. and Azizian, R. and Kempe, T. and Juliá, J. E. and Martínez-Cuenca, R. and Sundén, B. and Wu, Z. and Seppälä, A. and Ala-Nissila, T.},
  issn         = {1290-0729},
  language     = {eng},
  month        = {07},
  pages        = {504--531},
  publisher    = {Elsevier},
  series       = {International Journal of Thermal Sciences},
  title        = {Correct interpretation of nanofluid convective heat transfer},
  url          = {http://dx.doi.org/10.1016/j.ijthermalsci.2017.11.003},
  doi          = {10.1016/j.ijthermalsci.2017.11.003},
  volume       = {129},
  year         = {2018},
}