Thermal conductivity measurement of methanol-based nanofluids with Al 2O 3 and SiO 2 nanoparticles

Changwei Pang, Jung Yeul Jung, Jae Won Lee, Yong Tae Kang

Research output: Contribution to journalArticlepeer-review

128 Citations (Scopus)

Abstract

In this study, the methanol-based nanofluids with Al 2O 3 and SiO 2 nanoparticles are prepared by dispersing nanoparticles in pure methanol using an ultrasonic equipment. The main objective of this paper is to measure the thermal conductivity of the methanol-based nanofluids. We have also measured the zeta potential, particle size and Tyndall effect for the present nanofluids. The transient hot-wire method is applied for measuring the thermal conductivity of methanol-based nanofluids. The measurement uncertainty in repeatability is obtained as 1.95% for deionized (DI) water and 1.34% for pure methanol, respectively. The effective thermal conductivity of methanol-based nanofluids is measured at a temperature of 293.15 K. The results show that the thermal conductivity increases with an increase of the nanoparticle volume fraction, and the enhancement is observed to be 10.74% and 14.29% over the basefluid at the volume fraction of 0.5vol% for Al 2O 3 and SiO 2 nanoparticles, respectively. Clustering of nanoparticles is considered to be the main reason for the thermal conductivity enhancement.

Original languageEnglish
Pages (from-to)5597-5602
Number of pages6
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number21-22
DOIs
Publication statusPublished - 2012 Oct
Externally publishedYes

Keywords

  • Clustering
  • Methanol-based nanofluids
  • Particle size
  • Thermal conductivity
  • Zeta potential

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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