Dispersion stability and thermal conductivity of propylene glycol-based nanofluids

  • Ibrahim Palabiyik
  • Zenfira Musina
  • Sanjeeva Witharana
  • Yulong Ding
Research Paper

Abstract

The dispersion stability and thermal conductivity of propylene glycol-based nanofluids containing Al2O3 and TiO2 nanoparticles were studied in the temperature range of 20–80 °C. Nanofluids with different concentrations of nanoparticles were formulated by the two-step method and no dispersant was used. In contrast to the common belief, the average particle size of nanofluids was observed to decrease with increasing temperature, and nanofluids showed an excellent stability over the temperature range of interest. Thermal conductivity enhancement for both studied nanofluids was a nonlinear function of concentration and was temperature independent. Theoretical analyses were also performed using existing models compared with experimental results. The model based on the aggregation theory appears to be the best.

Keywords

Nanofluids Propylene glycol Alumina nanoparticles Titania nanoparticles Thermal conductivity Dispersion stability Synthesis 

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Ibrahim Palabiyik
    • 1
  • Zenfira Musina
    • 1
  • Sanjeeva Witharana
    • 1
  • Yulong Ding
    • 1
  1. 1.School of Process, Environmental and Materials EngineeringUniversity of LeedsWoodhouse LaneUK

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