Moldflow Second Order Viscosity model
The Moldflow second order viscosity model describes the temperature and shear rate dependence of the viscosity using a quadratic formulation.
The viscosity model is given by the following equation:
where:
is the viscosity (Pa s)
is the shear rate (1/s)
is the temperature (deg C).- and
to 
are data-fitted coefficients
Note: The second order viscosity model requires temperature values in degrees Celsius, whereas the Cross-WLF viscosity model requires temperature values in Kelvin.