Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 6 3 2010 09 01 Viscosity and Rheological Behavior of Ethylene Glycol-Maghemite Nanofluids 191 193 3967 EN Z. Hooshyar Department of Chemistry, Payame Noor University, Qazvin Branch, Qazvin, I. R. Iran G. R. Bardajee Department of Chemistry, Payame Noor University, Qazvin Branch, Qazvin, I. R. Iran Journal Article 2010 05 22 This work is devoted on the rheological behavior of ethylene glycol based nanofluids containing maghemtite nanoparticles. The size of these maghemite nanoparticles was measured using XRD and found to be about <50 nm. Major factors that influence on viscosity and rheological behavior, such as, temperature and particle mass concentration, were investigated over 25–80°C and 0.2 and 2% respectively. It was found that the nanofluids show shear-thinning behavior particularly at particle concentrations in excess of 0.2%. Temperature imposes a very strong effect on the rheological behavior of the nanofluids at higher temperatures. For a given particle concentration, there exists a certain shear rate below which the viscosity decreases by increasing the temperature.  https://www.ijnnonline.net/article_3967_b607ba543ad05417b8507ee86c54fcb7.pdf