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.
| Original language | English |
|---|---|
| Pages (from-to) | 966-971 |
| Number of pages | 6 |
| Journal | Korean Journal of Chemical Engineering |
| Volume | 25 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2008 Sept |
Bibliographical note
Funding Information:This work is supported by research grants from the Korea Science and Engineering Foundation through the Applied Rheology Center (ARC), an official ERC, at Korea University, Seoul, Korea.
Keywords
- Alumina nanoparticle
- Convective heat transfer
- Heat transfer coefficient
- Laminar flow
- Nanofluid
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering