Re: importing stl geometry files (cylinder3d)
1/ No, a section on “phase changing” approaches would we to advance for the spring school. We have a section on multi-phase/component methods. See the program here: http://www.openlb.net/spring-school-program
2/ For complex geometires I would directly work with an stl-file and not combine cylinders etc. – but you could.
Mathias