how can I obtain angular acceleration of the object in Fluent?

- February 20, 2023 at 2:55 pm
  
  Milne Ando
  Subscriber
  
  G'day,
  in dynamic mesh zones panel, we can get the moving object's angular velocity and angular displacement (angle), but I also need the data of its angular acceleration. Does anyone know how to get that?
  Hope someone can tell me. Thank you.
- February 20, 2023 at 4:13 pm
  
  Rob
  Ansys Employee
  
  I suspect you'll need previous time step velocity data and then work it out based on the time step size.
  - February 20, 2023 at 5:30 pm
    
    Milne Ando
    Subscriber
    
    it sounds like I need to import the six DOF file into matlab or Excel, and do some commands to get angular acceleration, right?
- February 21, 2023 at 9:48 am
  
  Rob
  Ansys Employee
  
  I suspect so. The surface forces and velocity are available, acceleration is a little more complex as it's the change in velocity. If you're using a UDF check for previous time step values, but note not all data is available.

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