Question

Which of the following is an example of Newtonian fluid?

(a) Water

(b) Plastic

(c) Colloids

(d) Gel

I have been asked this question by my school principal while I was bunking the class.

The doubt is from Infinitesimal Fluid Element topic in chapter Aerodynamics – Fundamental Principles and Equations of Aerodynamics

Answer 1

Right option is (a) Water

Best explanation: The fluids which obey Newton’s law of viscosity are Newtonian fluids. It states that the applied shear stress is directly proportional to the amount of deformation.

τ = μdv/dy

Where, μ—–viscosity of the fluid

       τ—-shear stress

dv/dy -velocity gradient.