Abstract
This study investigated the impact of silicon dioxide nanoparticle size on the viscosity and stability of nanofluids. A comprehensive study was conducted, including the synthesis and characterization of silicon dioxide nanoparticles of varying sizes, as well as the preparation and testing of nanofluids with different nanoparticle concentrations. The results show that nanoparticle size has a significant effect on both the viscosity and stability of nanofluids, with smaller nanoparticles leading to higher viscosity and improved stability. Silicon dioxide nanoparticles were dispersed in deionized water at mass fractions of 0.5% and 3% and average particle diameters of 12 nm and 40 nm using an ultrasonic disperser. The rheological properties of the obtained nanofluids at 304 K were studied depending on the mass concentration and linear size of nanoparticles in the liquid. An analysis of the results showed that the viscosity of the nanofluids increased with decreasing linear size of the nanoparticles. These findings have important implications for the development and optimization of nanofluid-based applications in various industries, such as electronics, energy, and biomedical engineering.
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