[Assassin]

Hello, I was trying desperately to patch a few elements with angular velocity. I can patch them with tangential/ axial / Radial and etc velocities but with angular velocity. Need help here.
For reference, I am trying to simulate a disk moving with (100 rads/sec) with water on top of it also moving with initial angular velocity (100 rads/sec).

[AlexanderZ]

combination of tangential/ axial / Radial velocities gives you "angular velocity"

each element will have it's own combination depends on it's location comparing to the center of rotation

for few elements you may compute ad apply it manually.

also you may try to apply this condition using profiles (x y z velocity_x) (x y z velocity_y) (x y z velocity_z)
something like that

[Assassin]

Thanks for the help. The problem is that the fluid part is on the moving wall having angular velocity of 100rads/sec. Few elements still mean 20,000 elements. Profile does sound good. I will try that. I am trying to simulate this video.

https://youtu.be/aw8PlJA99vY