Yes, this link works nicely! The setup currently contains two issues:
- The first one is CAD-related. The CAD model that was imported contains a series of sheet parts, which are not desired for simulations:
In short, the volumes should be watertight & solid for simulations. As I can tell, the underfloor of your car consists of a simple sheet, so that’s causing issues. I’d recommend going back to your cad model and adding some thickness to the part.
For further information, please check this page.
- The second problem is related to the enclosure operation. For Incompressible analysis, we need a single volume to run simulations (the flow region). The other solid parts should be removed from the geometry, otherwise they will cause a multi-region mesh error, which is the error that you ran into.
To solve this, please toggle off this option in the enclosure operation:
I’d recommend that you have a look at our external aerodynamics tutorial around a car, which will give you a good idea of the setup of this simulation.