Flow region couldn't be created

CAD Mode Support
1

When I make my flow region for my car I create it so that it only simulates half of the car. It normally works but this time it said that it could not be created due to the following problematic entities. It then said to consider cleanup operations

https://www.simscale.com/workbench/?pid=5109076749141574747&geo=3375aaf4-c81b-4dd7-bae3-6a17e1e2299d

2

Hi @abengani, thanks for posting on the forum and welcome to the SimScale Community :handshake:

I see that your CAD model indeed could benefit from some cleanups. The interference between the parts and them not exactly matching might be the entire reason why the flow region is not correctly generated.

Take the driver as an example:

image
image1920×945 155 KB

He is duplicated, as are other parts in your assembly.

My advice is to:

  1. Remove any duplicate parts from your original CAD model
  2. Remove all unnecessary parts and details
  3. Enhance the parts so that there are no weird shaped solids such as these ones:

image
image1920×945 179 KB

  1. Ideally and if not relevant, don’t let your car be hollow inside

This link might be useful too: CAD Preparation & Upload | Simulation Setup | SimScale

Cheers
Igor