Jump to main content
Jump to site search

Issue 22, 2016
Previous Article Next Article

Temperature-dependent effect of percolation and Brownian motion on the thermal conductivity of TiO2–ethanol nanofluids

Author affiliations

Abstract

Ethanol-based nanofluids have attracted much attention due to the enhancement in heat transfer and their potential applications in nanofluid-type fuels and thermal storage. Most research has been conducted on ethanol-based nanofluids containing various nanoparticles in low mass fraction; however, to-date such studies based on high weight fraction of nanoparticles are limited due to the poor stability problem. In addition, very little existing work has considered the inevitable water content in ethanol for the change of thermal conductivity. In this paper, the highly stable and well-dispersed TiO2–ethanol nanofluids of high weight fraction of up to 3 wt% can be fabricated by stirred bead milling, which enables the studies of thermal conductivity of TiO2–ethanol nanofluids over a wide range of operating temperatures. Our results provide evidence that the enhanced thermal conductivity is mainly contributed by the percolation network of nanoparticles at low temperatures, while it is in combination with both Brownian motion and local percolation of nanoparticle clustering at high temperatures.

Graphical abstract: Temperature-dependent effect of percolation and Brownian motion on the thermal conductivity of TiO2–ethanol nanofluids

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 Jan 2016, accepted on 06 May 2016 and first published on 10 May 2016


Article type: Paper
DOI: 10.1039/C6CP00500D
Citation: Phys. Chem. Chem. Phys., 2016,18, 15363-15368
  •   Request permissions

    Temperature-dependent effect of percolation and Brownian motion on the thermal conductivity of TiO2–ethanol nanofluids

    C. Li, N. Y. Hau, Y. Wang, A. K. Soh and S. Feng, Phys. Chem. Chem. Phys., 2016, 18, 15363
    DOI: 10.1039/C6CP00500D

Search articles by author

Spotlight

Advertisements