Li et al. [53] showed highly agreement
with most of the previouswork. They preparedwell-dispersed ethylene
glycol (EG)-based nanofluids containing ZnO nanoparticles with differentmass
fractions between 1.75% and 10.5% by a typical two-step method.
Structural properties of the dry ZnO nanoparticles were measured
by XRD and TEM. They measured experimentally thermal transport
properties or thermophysical properties, namely thermal conductivity
and viscosity. The experimental results showed that viscosity increases
with increasing the concentration of ZnO nanoparticles and decreases
with temperature.