TUFLOW General Discussion: Difference between revisions

<br>The <font color="blue"><tt>viscosity coefficients </tt></font><font color="red"><tt>== </tt></font>command on its own is used to set the eddy viscosity. In this instance, you need to set the dynamic viscosity, which is a property of the fluid itself. This can be used by setting the following commands:

 

 

Where K is the viscosity coefficient in Pa S when n = 1. Where n=1, this relates to a Newtonian fluid. You can then use an appropriate value for tau0, the stress required to make the fluid move. The Non-Newtonian model uses the Herschel-Bulkley approach which can be used to model Newtonian fluids with different viscosities. See section 5.4 of the new release notes [[https://downloads.tuflow.com/TUFLOW/Releases/2020-10/TUFLOW%20Release%20Notes.2020-10-AD.pdf here]] for more information.