Hi all i am trying to rotate plate ina microwave oven to study the process as well as as an exercise for roatational mechanics. while doing so ,i had some issues after importing the cad file. after importing the cad file the identity pair ;source and destination seems to be same and couldnt figure out why comsol kept like that. I know that the air gap needs to have a boundary ( identity pair) in order for body to move but i couldnt figure out why the identity pair remained the same. It will be helpful if someone could let me know to solve this roatational issue.
Thanks in advance