Orbital Shaking Model

- February 21, 2023 at 4:42 pm
  
  Kail Break
  Subscriber
  
  How do you move an object in a circle during the simulation to model orbital shaking? Even a link to a video where someone moves soemthing in the simulation would help.
- February 21, 2023 at 4:53 pm
  
  Rob
  Ansys Employee
  
  There are a couple of tricks using sliding mesh in Fluent. Please post a sketch of what's moving and the motion path.
- February 21, 2023 at 6:34 pm
  
  Kail Break
  Subscriber
  
  I am moving this hollow cylinder it has an 11.5mm outer radius. Its moves in a circle with a radius of 18mm at various RPM. The centerpoint of the hollow cylinder follows the motion path.
- February 21, 2023 at 6:38 pm
  
  Kail Break
  Subscriber
  
  I have the mesh set up and the model initialized. I just need to shake the model.
- February 22, 2023 at 9:42 am
  
  Rob
  Ansys Employee
  
  So, the outer casing is fixed and the core moves on an eliptical path? Or the whole lot moves? For the former you may need moving mesh, for the latter it's more a case of sliding mesh and reference frames.
- February 22, 2023 at 6:34 pm
  
  Kail Break
  Subscriber
  
  The whole lot moves.
- February 23, 2023 at 9:58 am
  
  Rob
  Ansys Employee
  
  OK, what you need to do is cheat. We can mess with gravity, but that needs UDFs. If you can break the motion into circular sets what you can do is use sliding mesh and mess with the relative motion. You may need a "dummy" block of solid with a very coarse mesh to do this. Have a look for the vertical axis wind turbine (VAWT) threads as that's how we do those.

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