[Gate-users] Question about a volume source

[Amy Meldrum]

Gate users,

I have a question regarding defining volume sources. Let's say I have a
sphere that is inside of a cube. If I wanted my source to be the the whole
space of the cube but NOT the sphere, how would I define that? I basically
just want to define a volume source that effectively 'goes around' other
volumes. From what I can read in the manual, it seems like I would only be
able to specify the entire cube as a source, rather than 'a cube minus a
sphere' type of source.

Any help is appreciated, I really need to know if this is possible, or if I
have to start thinking of different ways to model some experiments of mine.

-Amy
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