peteroznewman
Subscriber
I'm saying that you can either use two Symmetry BCs on two orthogonal planes or you can apply the constraints shown in the image, but if you do that, don't call it symmetry.
Symmetry means the normal displacement to the plane and two rotations in the plane are set to 0.
The constraints shown in the image have symmetry and an extra displacement set to 0 which prevents nodes from moving in the plane of symmetry in one direction only! How is that achieved in reality? This constraint pattern is no longer what anyone would call a symmetry BC.
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