I need to mesh a circular pipe (40 cm diameter), which is intersected by two smaller pipes (20 cm diameter), one at the top and one at the bottom of the bigger one. The pipe at the top is perpendicular to the big pipe, while the other is inclined of 45 degrees (see the scheme. Sorry for poor quality, but I don't know how to post images):

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I need to use a hex mesh, because I've already tryed thetrahedral, obtaining bad results. How can I decompose the domain?

Thanks for help

ap

split the initial volume by face between big pipe and the first side pipe (create this face if necessary). Do the same, with lower side pipe and big pipe. Or, you can use split volume by volume operation if you have all three volumes initially created.

anna