Hello,
I’m trying to solve a problem set on an unbounded domain, which is truncated a long way from the region of interest. I’m running into a few difficulties, which I suspect are relatively easy to do, but I’m not sure what the correct procedure is:

I’m running into issues when the inner model has a complex geometry (made up with multiple primitive objects and defined in a .geo file) and placed in a domain with truncation far from the object around 100 times the size of the object. In such cases, the Netgen gets stuck finding points or edges, but works when the outer boundary is placed closer to the object. Is there anything I could try to solve this?

In an attempt to overcome 1), I’ve attempted to resize my domain. Eg consider a simple case where the inner region is a sphere and the outer truncation domain is also a sphere (of much larger radius) and considering the two cases
a) inner sphere radius 1, outer sphere radius 100
b) inner sphere radius 0.1, outer sphere radius 10
how can I best control the mesh spacing so that they result in a similar number of elements?
Kind regards,
Ben