Improvement of cooling performance of hybrid nanofluids in a heated pipe applying annular magnets
(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
- Li, Guolong ; Wang, Jin LU ; Zheng, Hongxing ; Xie, Gongnan LU and Sundén, Bengt LU
- organization
- publishing date
- 2022
- 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}}, }