Assessment of Temperature and Nanoparticle Concentration on the Viscosity of Glycerine-water Based SiO2 Nanofluids

Abstract

Experimentally determined dynamic viscosity of SiO₂/22nm nanofluids produced in a glycerine-water (30:70 by volume) mixed base liquid, referred to as GW70. Nanofluids with concentrations of 0.2, 0.6, and 1.0 percent are created, and viscosity measurements are performed using an LVDV-2T Brookfield Viscometer at temperatures ranging from 20 to 80 degrees Celsius. FESEM and EDX are used to determine the particle size and elemental composition of nanoparticles, while XRD pictures demonstrate the presence of SiO₂ peaks in the crystalline structure. The concentration of nanoparticles affects the rheology of nanofluids. Nanofluids behave Newtonian in the experimental temperature and concentration range. Nanofluids' viscosity rose as particle concentration grew and decreased as temperature increased. The greatest viscosity value is reached at 1.0 percent vol. concentration at 20^oC, while the lowest viscosity value is recorded at 0.2 percent vol. concentration at 80^oC. At 20, 40, 60, and 80 degrees Celsius, the viscosity of the glycerine-water base fluid was also measured. For all nanofluids, the viscosity ratio to the base liquid is found to be greater than one. HTC of glycerine-water-based silica nanofluids may be estimated using this viscosity data.