Trouble Defining Flow Volume

i am trying to simulate air flow and ventilation inside an box containing electrical components with varying degrees of power dissipation which will produce heat. Right now i am having some issues defining the flow region of air inside the box. I can select a seed face and boundary as the tutorials show but i receive errors saying that flow volume is infinite? Can anyone help me understand what i am doing wrong>

Thank you.

Hi, and thanks for using the forum.

Please always include a link to your project so we can look for the source of the problem.

https://www.simscale.com/workbench/?pid=3695296391704695255&mi=spec%3Aa725f556-0507-41d1-849e-51cbb26bcd89%2Cservice%3ASIMULATION%2Cstrategy%3A19&ps=domain

sorry, heres a link

Hi,

I was able to create the flow region as you can see in my copy of the project:

https://www.simscale.com/workbench/modeller?pid=7093593845635012533&sessionId=3ae33495-5929-45ec-a9b7-1267f24b0180

The problem was an interference between these two parts:

I solved the issue by deleting the holes in the case and then re-creating them with a boolean subtraction from the protruding part.