The following results are obtained on shear stress (τ) and rate of deformation \(\left( {\frac{{du}}{{dy}}} \right)\) at constant temperature for a fluid.
| \(\left( {\frac{{du}}{{dy}}} \right)\)(radians/sec) | 0 | 1 | 2 | 3 |
| τ (kPa) | 10 | 20 | 30 | 40 |
The above fluid is classified as
1
Newtonian
2
Non-Newtonian
3
Ideal plastic
4
Thixotropic