Question

2. Do you characterize the fluid in part (1) above as:
(a)
(b)
(C)
(d)
(e)
Newtonian?
Bingham plastic?
Shear-thinning Power-law?
Shear-thickening Power-law?
Other fluid?
Explain your answer. (10 points)​

Answer 1

Answer:

For Bingham plastic fluid, the shear stress beyond the yield stress is linearly proportional to the shear rate. If the yield stress approaches zero, the Bingham plastic fluid can be approximately treated as a Newtonian fluid.

Dilatant, or shear-thickening fluids increase in apparent viscosity at higher shear rates. ... Under high shear rates the water is squeezed out from between the starch molecules, which are able to interact more strongly, enormously increasing the viscousity.