View source for Herschel-Bulkley fluid

The Herschel-Bulkley fluid is a generalized model of a non-Newtonian fluid.  Generally, the stress of the fluid is related to the strain in a nonlinear way.  In the Herschel-Bulkley model, the fluid is characterized by the consistency <math>k</math>, the flow index <math>n</math>, and yield shear stress <math>\tau_0</math>.  The consistency is a constant of proportionality, and the flow index is a measure of non-linearity in the stress-strain curve - that is, how shear-thinning or shear-thickening the fluid is.  The yield stress is the amount of stress the fluid must experience before it begins to flow.

== References ==
[http://en.wikipedia.org/wiki/Herschel%E2%80%93Bulkley_fluid Wikipedia entry]