[Kerouac]

Hi everyone,
I have to simulate the two-phase fluid flow in a Y-micromixer. These fluids have very different viscosities and are miscible. For that reason, I do not use volume-of-fluid, which applies to immiscible fluids.
The idea is to evaluate the effect of varying the viscosity of a fluid on the overall mixing process in the microdevice.
These fluids are non-newtonian but implementing the single laws is not a problem.
My question is: what are the right physics and settings to set in Ansys Fluent to evaluate the mixture together with diffusion?
Thanks in advance.
Best regards,
K.