Dear B. Jaismitha ,

Although I do not know the answer, the criteria to consider either if a fluid is newtonian or non-newtonian is the dependence of the viscosity against the shear rate.

For a newtonian fluid, the viscosity is constant with the shear rate, but for a non-newtonian fluid, there is some functionality. This functionality is what difference a power-law fluid, from a Bingham fluid, from a pseudoplastic fluid, etc (all of them non-newtonian).

For your ethyelene glycol I would suggest to test, in a rheometer, the viscosity against different shear rates (this is a standard test). If you see some variation of this viscosity when varying the shear rate, then your fluid is non-newtonian.

Hope it helps!

Ethylene glycol may be Newtonian flow behaviour or marginally non-Newtonian - Flow behviour index (n) approximately equal to 1. and to be measured using Rheometer at wide range shear rates. Observe the shear stress -shear rate data calculate the model parameters and come to a conclusions

Ethelene glycol is a conventional newtonian fluid

Ethylene glycol is generally classified as a "Newtonian fluid", meaning that its viscosity remains constant regardless of the shear rate applied to it. In Newtonian fluids, the relationship between shear stress and shear rate is linear, and this is true for ethylene glycol under typical conditions.

However, the confusion about it being non-Newtonian may arise in specific contexts. Some sources might refer to it being treated as non-Newtonian in complex mixtures or in certain non-standard flow conditions, such as high-pressure or temperature environments. Additionally, when ethylene glycol is used in nanofluids or hybrid mixtures (e.g., with nanoparticles), the overall fluid behavior might exhibit non-Newtonian characteristics due to the interactions of the particles with the base fluid.

In typical flow simulations and applications involving pure ethylene glycol, it is treated as Newtonian.