Elmer Discussion Forum

In 3d groups of solid elements become bodies, groups of plate elements become boundary surfaces. 1D elements are eliminated if you use -autoclean. ElmerGUI uses -autoclean by default.

In 2D models groups of plate elements become bodies, groups of 1D elements become boundaries.

Void in the plate on the left side, right side no void.

This was my attempt, with and without the magnets. Without the magnets and no need for contact, the rotor deforms as expected.
with magnets on the left, without on the right
on the left it appears to deflect inward instead of outward as expected. The white is undeformed

Sphere for the air is better, 1 infinity boundary, and the BC is written for the spherical case.
Electric Infinity BC Logical
The spherical approximation for the open boundaries extending to infinity.

These are the names of the bodies and boundaries in your mesh ! ----- names for bodies ----- $ body = 1 $ enclosure = 2 ! ----- names for boundaries ----- $ inlet = 1 $ outlet = 2 $ walls = 3 $ left_face = 4 $ front_face = 5 $ right_face = 6 $ back_face = 7 $ top_face = 8 $ bottom_face = 9 So the BC...

There is a contributed case index on the board, your case would make a great contribution.

The vacuum or air should completely surround the plates so as to have an infinity BC on the outer surface. I prefer a sphere because the outer surface better matches the BC.

wetcase2.sif That final plot was actually from spreadsheet. To get to spreedsheet I go into paraview. You can actually plot nodal data as a function of step directly in paraview. Using interactive select node and then plot selected data over time. But if I want to have better control or plot result...

I tested the beam case in transient by tweaking the top of the beam the letting it vibrate freely. I used the FSI obstacle tutorial as a guide.
The magnitude of the motion in water is much different than in air, but the frequency is unchanged. So FSI means loading only not mass.