Experimental study on rheological behavior of water-ethylene glycol mixture in the presence of functionalized multi-walled carbon nanotubes

This paper examines the rheological behavior of water (60%vol.)-ethylene glycol (40%vol.) mixture in the presence of functionalized multi-walled carbon nanotubes. At the first, the viscosity of various samples was measured at shear rates ranging from 6.115 to 73.38 s(-1) and temperature range of 25-50 A degrees C. Then, using the experimental data, some correlations were proposed to predict the viscosity of the nanofluid. Viscosity measurements at different shear rates revealed that all nanofluid samples were non-Newtonian power law fluid. Findings showed that consistency index increased along with volume fraction, while it decreased with increasing temperature. Moreover, the values of power law index were always less than 1, indicating shear thinning behavior.