Originally Posted by cheng1988sjtu (Post 512698)

OK, It's a silly question here, I know how to specify the pressure difference between two cyclic BC now. It turns out that the purpose of using faceSet is to cut the domain to get two cut faces, and it's not necessary for my case, I just need to use groovyBCJump directly on my cyclic BC.

Hope this is useful for other first users of groovyBCJump, like me. :-)