Definition
In non-Newtonian fluids, the shear stress due to viscosity, is modeled by
where
- k is the consistency index
- n is the flow behavior index
- du/dy is the shear rate, with velocity u and position y
To ensure that has the same sign as du/dy, this is often written as
where the term
is defined as the apparent viscosity.
Read more about this topic: Apparent Viscosity
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