3.5. NON-NEWTONIAN FLUIDS
3.5A. Types of Non-Newtonian Fluids
As discussed in Section 2.4, Newtonian fluids are those which follow Newton's law, Eq. (3.5-1):
Equation 3.5-1
where μ is the viscosity and is a constant independent of shear rate. In Fig. 3.5-1 a plot is shown of shear stress τ versus shear rate −dv/dr. The line for a Newtonian fluid is straight, the slope being μ.
Figure 3.5-1. Shear diagram for Newtonian and time-independent non-Newtonian fluids.
If a fluid does not follow Eq. (3.5-1), it is a non-Newtonian fluid. Then a plot of ...
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