Share

IIR document

Investigation on stability and properties of water-based gold nanofluids.

Number: pap. n. TP-042

Author(s) : COLLA L., BLOSI M., SCATTOLINI M., et al.

Summary

This paper investigates the stability, thermal and transport properties, and convective heat transfer coefficients of water-based nanofluids containing gold (Au) nanoparticles. Nanofluids were prepared with a one-step “eco-friendly” method, which exploits sodium citrate both as the reducing and chelating agents. A Dynamic Light Scattering (DLS) technique was used to measure the diameter of the suspended nanoparticles. Thermal conductivity and dynamic viscosity data for nanofluids with mass concentrations of 0.02 %, 0.05 % and 0.1 % were measured at atmospheric pressure in the temperature range between 10°C and 70°C. In order to evaluate the ability of nanofluids to improve the liquid phase heat transfer efficiency with respect to the base fluid, the convective heat transfer coefficient was experimentally measured in a dedicated experimental set-up. A constant heat flux was supplied to the fluid and the turbulent flow regime was investigated for various flow rates and inlet fluid temperatures, near ambient temperature. The measured thermal conductivity and dynamic viscosity data are used to determine the Reynolds and Nusselt numbers, and the nanofluid heat transfer coefficient coefficients are compared with pure water ones.

Available documents

Format PDF

Pages: 298-305

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Investigation on stability and properties of water-based gold nanofluids.
  • Record ID : 30008115
  • Languages: English
  • Source: 4th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Publication date: 2013/06/17

Links


See other articles from the proceedings (69)
See the conference proceedings

Indexing