This paper presents liquid kinematic viscosity and density measurements of a synthetic polyolester based copper (II) oxide (CuO) nanoparticle dispersion (nanolubricant) at atmospheric pressure for a temperature range from approximately 288 K to 318 K. The polyolester was a commercially available chiller lubricant. The CuO particles were approximately 30 nm-diameter, spherical, and well dispersed. The density of the CuO nanoparticles was shown to differ significantly from the known density for macro CuO. Viscosity and density measurements were made for the pure base lubricant along with three nanolubricants with differing nanoparticle volume fractions (2%, 4% and 40%). The viscosity and the density were shown to increase with respect to increasing nanoparticle volume fraction. Correlations of the viscosity and the density are presented as a function of temperature and nanoparticle concentration. The measurements are important for the design of nanolubricants for heat transfer and flow applications.
Proceedings Title: Third conference on thermophysical properties and transfer processes of refrigerants
Conference Dates: June 23-26, 2009
Conference Location: Boulder, CO
Pub Type: Conferences
additives, boiling, copper (II) oxide, nanotechnology, viscosity, density, lubricant, nanofluids