The models of viscosity
is a very important data in the Navier-Stokes equation and give the non-linearity.
This term is never a constant but it is easier to fix it.
The fluid can be classified in different types who the viscosity is the term of comparisons.
The model used in the simulation for the non newtonian fluid
We used the fluid of Bingham :
Click here in order to see the file where the viscosity is modified.