I ask this question because I do not see (m)any examples and I'd like to avoid to spend hours or days to work into a mesher only to see that it is impossible:
Consider the sketch below. As you see, I have a box with a mesh. Inside this box, there's also a circle. This is sort of an "internal boundary" and I would like that some nodes exactly stick on the circle and the edges between "inner" and "outer" elements approximate the circle shape as good as possible. In real world, the circle could be a way more complex structure, and there could even be inner-inner surfaces.
A few questions arise:
- Does this task have a "name" (to facilitate internet searches)?
- Is it a task that every reasonable mesher can handle or do I need something special?
- I currently try GMESH. Is that possible with GMESH? (An example would be greatly appreciated.)
- Or do you recommend something different?