Dear FreeFem++ team, I know in the PDE, we can do on(Label,ux=0,uy=0) to apply the boundary condition to close the displacement . However, I was wondering how can we constrain a disc displacement (ux, uy) at its center without closing the Rz rotation. [we do not want it to move up and down but can …

Thank you so much Frederic, I think this is exactly what I want.

Probably not the answer about how to do it in Freefem, but I would do a coordinate transformation to pass to the co-rotating frame…

Hello Julien, thank you for the answering, would you mind give me some simple examples about this idea? Thank you.

yes frederic, thank you for your reply. you can see the image I send here. we want to make the right hole can freely rotate in Y axis. I also attached one of my mesh file here. [label 12 is the load hole, label 6 is the clamped hole, and label 5 is the rotate hole] REAL_CASE.mesh (232.5 KB) Thank…

OK, I static case you can do penalization on rotation boundary normal displacement is zero: like in this example elas-rot.edp (1.4 KB) remark, you can play with boundary condition to see the difference .

Is there any way in freefem, we can implement rotation boundary condition

General Discussion

frederichecht (Frédéric Hecht) August 20, 2022, 3:45pm 4

Can you send a real model of your problem, because can have lot of way to modélise a rotating objet.

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Is there any way in freefem, we can implement rotation boundary condition

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