Title: Effect of different surface modified nanoparticles on viscosity of nanofluids
Abstract: Resistance to fluid flow creates various problems, and fluid viscosity reduction can effectively control these problems. Hydrophilic TiO2-water and hydrophilic-lipophilic TiO2-water nanofluids were prepared by stirring and ultrasonic mixing; the rotational viscometer was used to measure the viscosity of nanofluids that formed by different surface modifications of nano-titanium dioxide and deionized water. The results show that the viscosity of TiO2-water nanofluid increases with the decrease in the temperature and increase in the mass fraction of nanoparticles, the hydrophilic TiO2-water nanofluids has a slightly larger viscosity than the hydrophilic-lipophilic TiO2-water nanofluids, and the higher the mass fraction of the nanoparticles is, the greater the difference is.