Hello all,

I'm using SW Flow Simulation for the first time. I want to simulate a flow inside a box, without any enter or exit of the flow, just circulate the inside air.
For that purpose I have instaled 8 fans spread in the model.

I have done all the steps that I saw on youtube tutorials, the problem here is I dont have a inlet and outlet area. I don't know how to define the boundary conditions and the Start flow conditions.

The red arrows represents one of the path that I need to do, between the blue faces and the yellow faces. The difference between this to is 40mm.

I have tried to choose the bottom face as the beggining of the flow but it says that starting points were not criated. I have tried to chooese the face if the fans instead, it didint work to.

I have the computational domain in the inside wall blue faces.

Anyone can help me with this?

Thank you.