Viscosity

Viscosity = {yes | no}

Description / Usage

This option allows you to plot the viscosity, which is written to the Output EXODUS II file as the variable MU. This is a useful feature for non-Newtonian fluids such as Phillip’s model for suspensions, Bingham plastic models, polymerizing solutions and other materials for which the viscosity may change orders of magnitude, greatly affecting the velocity and pressure fields. Contouring this variable MU over the domain can be useful in explaining some physical phenomena.

he permissible values for this postprocessing option are:

yes	Calculate the viscosity and output as a nodal variable in the Output EXODUS II file.
no	Do not calculate the viscosity.

Examples

The following sample card requests MU be written to the EXODUS II file:

Viscosity = yes

Technical Discussion

See the material file Viscosity card for an explanation of the models for which the viscosity is variable and dependent on the flow field and other variables.