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Improvement of cooling performance of hybrid nanofluids in a heated pipe applying annular magnets

Li, Guolong ; Wang, Jin LU ; Zheng, Hongxing ; Xie, Gongnan LU and Sundén, Bengt LU (2022) In Journal of Thermal Analysis and Calorimetry 147(7). p.4731-4749
Abstract

In this paper, convective heat transfer of Fe3O4–carbon nanotubes (CNTs) hybrid nanofluid was studied in a horizontal small circular tube under influence of annular magnets. The pipe has an inner diameter of 3 mm and a length of 1.2 m. Heat transfer characteristics of the Fe3O4–water nanofluid were examined for many parameters, such as nanoparticle volume fraction in the range of 0.4–1.2% and Reynolds number in the range of 476–996. In order to increase the thermal conductivity of the Fe3O4–water nanofluid, carbon nanotubes with 0.12–0.48% volume fraction were added into the nanofluid. It was observed that for the Fe3O4–CNTs–water nanofluid with... (More)

In this paper, convective heat transfer of Fe3O4–carbon nanotubes (CNTs) hybrid nanofluid was studied in a horizontal small circular tube under influence of annular magnets. The pipe has an inner diameter of 3 mm and a length of 1.2 m. Heat transfer characteristics of the Fe3O4–water nanofluid were examined for many parameters, such as nanoparticle volume fraction in the range of 0.4–1.2% and Reynolds number in the range of 476–996. In order to increase the thermal conductivity of the Fe3O4–water nanofluid, carbon nanotubes with 0.12–0.48% volume fraction were added into the nanofluid. It was observed that for the Fe3O4–CNTs–water nanofluid with 1.44% volume fraction and under a magnetic field, the maximal local Nusselt number at the Reynolds number 996 increased by 61.54% compared with without a magnetic field. Results also show that compared with the deionized water, the maximal enhancements of the average Nusselt number are 67.9 and 20.89% for the Fe3O4–CNTs–water nanofluid with and without magnetic field, respectively.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Carbon nanotube, Convective heat transfer, Ferrofluid, Magnetic field, Magnetic nanofluid
in
Journal of Thermal Analysis and Calorimetry
volume
147
issue
7
pages
4731 - 4749
publisher
Akademiai Kiado
external identifiers
  • scopus:85106293310
ISSN
1388-6150
DOI
10.1007/s10973-021-10848-6
language
English
LU publication?
yes
id
3bdaf5eb-15f4-47b7-ab16-5f473eca00cd
date added to LUP
2021-12-17 10:04:15
date last changed
2023-11-09 02:00:40
@article{3bdaf5eb-15f4-47b7-ab16-5f473eca00cd,
  abstract     = {{<p>In this paper, convective heat transfer of Fe<sub>3</sub>O<sub>4</sub>–carbon nanotubes (CNTs) hybrid nanofluid was studied in a horizontal small circular tube under influence of annular magnets. The pipe has an inner diameter of 3 mm and a length of 1.2 m. Heat transfer characteristics of the Fe<sub>3</sub>O<sub>4</sub>–water nanofluid were examined for many parameters, such as nanoparticle volume fraction in the range of 0.4–1.2% and Reynolds number in the range of 476–996. In order to increase the thermal conductivity of the Fe<sub>3</sub>O<sub>4</sub>–water nanofluid, carbon nanotubes with 0.12–0.48% volume fraction were added into the nanofluid. It was observed that for the Fe<sub>3</sub>O<sub>4</sub>–CNTs–water nanofluid with 1.44% volume fraction and under a magnetic field, the maximal local Nusselt number at the Reynolds number 996 increased by 61.54% compared with without a magnetic field. Results also show that compared with the deionized water, the maximal enhancements of the average Nusselt number are 67.9 and 20.89% for the Fe<sub>3</sub>O<sub>4</sub>–CNTs–water nanofluid with and without magnetic field, respectively.</p>}},
  author       = {{Li, Guolong and Wang, Jin and Zheng, Hongxing and Xie, Gongnan and Sundén, Bengt}},
  issn         = {{1388-6150}},
  keywords     = {{Carbon nanotube; Convective heat transfer; Ferrofluid; Magnetic field; Magnetic nanofluid}},
  language     = {{eng}},
  number       = {{7}},
  pages        = {{4731--4749}},
  publisher    = {{Akademiai Kiado}},
  series       = {{Journal of Thermal Analysis and Calorimetry}},
  title        = {{Improvement of cooling performance of hybrid nanofluids in a heated pipe applying annular magnets}},
  url          = {{http://dx.doi.org/10.1007/s10973-021-10848-6}},
  doi          = {{10.1007/s10973-021-10848-6}},
  volume       = {{147}},
  year         = {{2022}},
}