In the thermal simulation linked below, I’m modelling a completely sealed metal box. I’ve got one solid representing the air inside the box, another solid representing the air outside the box, and the “walls” of the box are represented using a “No-Slip” “Specific Conductance Interface Thermal” Contact between these two solids. The reason I don’t have a solid for the box is because the walls are very thin (~1mm in a ~1m sized sim); I had great trouble getting the mesh to represent this configuration without using vastly more cells.
This simulation seems to work fine as it is. But now, I want to add vents (i.e., holes) to the box. Here are the options I can think of, along with why they don’t feel suitable:
- Configure certain contacts to allow air flow between them (afaict this is not allowed, as the options seem to only be no-slip walls and slip walls?)
- Create a single region which has self-contacting faces (I’m not sure it’s possible to coax OnShape into outputting this, and it feels like a cruel case to subject the mesher to)
Any ideas or suggestions would be most appreciated!
My current project is at the link below, but there’s really not much to see because I haven’t attempted to represents the vents at all yet (although it does illustrate my infinitesimally thin walled box):