Dynamic Viscosity of Indium Oxide-Ethylene Glycol (In2O3-EG) Nanofluids: An Experimental Investigation

Nanofluids, which are suspensions of nanoparticles, are interesting engineering materials, which might find numerous applications in industry. Unfortunately, there is no coherent theoretical model describing viscosity of nanofluids and further experimental and theoretical studies of this issue should be performed. This paper makes a contribution to this field. Dynamic viscosity of ethylene glycol based nanofluids containing indium oxide nanoparticles was measured in shear rate range from 10 s(-1) to 1000 s(-1) at constant temperature. It was presented that those materials exhibit Newtonian nature. Viscosity increases with the volume fraction of particles in nanofluids, and the Krieger-Dougherty equation could be applied to describe this increase. Additionally, a dependence of viscosity on temperature was examined in the range from 278.15 K to 338.15 K with constant shear rate 100 s(-1).