Simulation of a duct consisting of sections with different fluids

Hi,
I would like to simulate a fluid that flows thru a duct consistingof several sections. In one section the fluid changes itsproperties. The fluid has a Non-Newtonian behavior and changes theTau0, which is defined in Engineering Database.
Does anyone know the best way to do this? is it possible tosimulate this with FlowSimulation2009?

Thanks for your help!

Jürgen
SolidworksFlow Simulation