A Newtonian fluid is that__________________?
Correct answer: A. For which shear & deformation are related as T = μ (∂u/∂y)
- A. For which shear & deformation are related as T = μ (∂u/∂y)
- B. Which needs a minimum shear, before it starts deforming
- C. Which follows Newton's law of motion
- D. None of these
Explanation
A Newtonian fluid has shear stress directly proportional to the velocity gradient, τ = μ(∂u/∂y), with constant viscosity at fixed conditions. A minimum shear stress before deformation is characteristic of a yield-stress non-Newtonian fluid.
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