Category: Transient Plane Source
Author(s): Claudio Zilio, Giovanni A. Longo
Keywords: Cluster Size Distribution, DLS, Dynamic Light Scattering, Dynamic Light Scattering (DLS) Nano-Sizer Apparatus, Glycol, Nano-Sizer Apparatus, Nanofluids, Nanoparticles, TEM, Thermal Conductivity, transient plane source method, Transmission Electronic Microscope, Transmission Electronic Microscope (TEM), viscosity, Zeta Potential
Abstract: The thermal conductivity and dynamic viscosity of Al2O3-ethylene glycol and TiO2-ethylene glycol nanofluids have been determined as a function of the nanoparticle volume fraction (from 1 to 3 %) and temperature. It was determined that the thermal conductivity increased with increasing temperature as well as with increasing particle volume fraction for both types of nanofluids, but increasing the particle volume fraction caused a more significant increase than increasing the temperature. The Al2O3-ethylene glycol nanofluids were found to have a higher thermal conductivity than the TiO2 nanofluids of the same nanoparticle concentration. The relative viscosities of the nanofluids in comparison to ethylene glycol increased with increasing nanoparticle concentration, but were relatively independent of temperature.
Reference: International Journal of Thermophysics, 34 (2013) 1288-1307