Measurement of the viscosity coefficient of an ethylene glycol-based nanofluid with silicon-dioxide particles

摘要

An experimental investigation of the viscosity of ethylene glycol-based nanofluids with SiO_2 particles was studied. The experiments were carried out with nanofluids having an average particle size of 18.1, 28.3, and 45.6 nm. The nanopowder of SiO2 particles was obtained by evaporating the initial quartz material with subsequent condensation of vapors in the form of solid nanoparticles. During the preparation of the suspension, the necessary nanopowder mass was added to the measured ethylene glycol mass. Then the vessel with components was placed in the ultrasonic amalgamator for destruction of conglomerates of nanoparticles. The treatment in the amalgamator continued for 15-30 min. The viscosity was measured with a rotational viscosimeter. The data obtained by the capillary and rotational viscosimeters were identical within the limits of accuracy of measurements. It is shown that the viscosity coefficient of these nanofluids substantially depends on the sizes of nanoparticles.