Hello,

I'm trying to simulate the transportation of gas inside volumes. I tried to base myself on the tutorials, but I'm not sure I did it right.

I putted all walls on no slip, an entrance and a exit for the gas as in the tutorial. For the simulation I used the transient and BDF setups. You can find in attachment the case.sif and the result illustrated with paraview (the volume is almost cylindrical, I need to succeed to use the 3d because it's just the first step. Later I'll use non symmetric volumes).

First of all you can see that in the bottlenecks the gas does not seem to go through. Is it just the representation that fail to use unique tetrahedrons or there's a problem?

Then the vectors does not look correct to me, they seem to go directly against the walls, without really following it.

The question is simply, do I use correctly the Navier-Stokes simulation, given in the attached case.sif?

Thank you very much for your help