Flow Curves of a Herschel-Bulkley Fluid

fluid properties

yield stress

τ

0

(Pa)

5.

consistency

k (Pa

n

s

)

2.

flow index

n

0.7

shear rate



γ



-1

s



50.

axes maxima

τ

60.

η

app

4.



γ

(

-1

s

) = 50.00 τ (Pa) = 35.92

η

app

(Pa s) = 0.72

This Demonstration lets you generate and plot flow curves of Newtonian, Bingham, and shear-thinning (pseudoplastic) fluids using the Herschel–Bulkley model. It provides visualization of the differences between Newtonian and non-Newtonian fluids and how they are affected by the yield stress, consistency, and flow index. It also shows how the apparent viscosity of non-Newtonian fluids, unlike that of Newtonian fluids, changes with the shear rate.