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The zero shear viscosity is the value of the apparent viscosity (quotient between shear stress and shear rate) of a liquid in the limit of zero shear rate (i.e., when the fluid it is at rest). Therefore it is not the result of a direct measure but a calculus or interpolation from experimental results at the lower shear rates values. The most important thing is its physical meaning. It represents the ability of the material to avoid sedimentation when storage. A high zero shear viscosity is interpreted as a the material will show homogeneous during long storage.

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Q: What is the zero shear viscosity?
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Is zero-shear viscosity the same as maximum viscosity?

To answer my own question :), if I interpret the differentials correctly, viscosity does have its maximum when there are no shearing forces, regardless of whether the fluid is newtonian or not. So, in short, yes.


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