Influence of nanofluid Properties on Turbulent Forced Convection Heat
Transfer in different base liquids
Abstract
The turbulent characteristics of heat transfer and flow have been
determined by applying the Van Driest model of the eddy diffusivity for
water and ethylene glycol-based nanofluids. The properties of CuO, Al2O3
and SiO2 nanofluids in two base liquids viz., water and EG-water mixture
with the ratio of 60:40 are considered for various concentrations and
bulk temperature ranges. Based on the observations, it is concluded that
numerical outcomes are validated with experimental measurements for heat
transfer properties. It is monitored that SiO2 reaches a higher
temperature gradient in comparison to CuO at a similar temperature and
concentration in EG-water with the mixture of 60: 40. The gradients are
greater for the EGW mixture compared to water-based nanofluids. However,
the water-based nanofluids have higher heat transfer coefficients
compared to EG-water nanofluid at identical flow velocities.