[Kwiaci]

I have conducted two simulations of the steady flow in a pipe with some obstacles inside.
First simulation was in steady state and second was in unsteady state with 0.05 second step and long simulation time was used. Flow generally is laminar but gets turbulent in vicinity of obstacles.
The problem is that I get two different solutions. Contours of velocity magnitude are in attachments.

Does anyone know why these solutions are different?