No change in laminar flow simulation results even after changing material properties like Dynamic viscosity and Density.

Hi,

I have been doing very straight-forward and simple laminar flow simulations in a chamber. I have observed that flow simulation results don't change if I add and use another fluid with different dynamic viscosity and density. I tried varying the viscosity values but I couldn't notice any change in velocity gradients. I don't fully trust my results because of this reason.
Also, I would not be able to run these flow simulations if I don't mention at least dynamic viscosity and density of the fluid.

Thank you for having a look.

Best,
Vishal