I'm working on some tests concerning 'venting analysis' and I've read everything that I found about this issue.
I have some doubts about the advanced option 'venting analysis locations grouping':
Attached follow a pdf with some pictures of my studies, with all options of 'grouping' being used.
I would like to know what would be, physically, the difference between all 6 types of vents created, cause the results of filling are pretty different, specially 'air vent pressure' on all the ribs. In one of them even 'short shot' happened while in the other similar studies it didn't happen.