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Effect of alumina nanoparticles in the fluid on heat transfer in double-pipe heat exchanger system

Authors
Chun, Byung-HeeKang, Hyun UkKim, Sung Hyun
Issue Date
9월-2008
Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
Keywords
Convective Heat Transfer; Heat Transfer Coefficient; Nanofluid; Alumina Nanoparticle; Laminar Flow
Citation
KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.25, no.5, pp.966 - 971
Indexed
SCIE
SCOPUS
KCI
Journal Title
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume
25
Number
5
Start Page
966
End Page
971
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/122777
DOI
10.1007/s11814-008-0156-5
ISSN
0256-1115
Abstract
This study was performed to investigate the convective heat transfer coefficient of nanofluids made of several alumina nanoparticles and transformer oil which flow through a double pipe heat exchanger system in the laminar flow regime. The nanofluids exhibited a considerable increase of heat transfer coefficients. Although the thermal conductivity of alumina is not high, it is Much higher than that of the base fluids. The nanofluids tested displayed good thermal properties. One of the possible reasons for the enhancement on heat transfer of nanofluids can be explained by the high concentration of nanoparticles in the thermal boundary layer at the wall side through the migration of nanoparticles. To understand the enhancement of heat transfer of nanofluid, an experimental correlation was proposed for an alumina-transformer oil nanofluid system.
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