In Fluent, how to apply velocity input at specific time in a cell zone

- October 24, 2023 at 6:27 pm
  
  raihan57
  Subscriber
  
  I want to apply zero velocity for 5 seconds and after that, I want to apply constant velocity in a cell zone. Would you please help me how to write the expression or UDF for that? I want to use mesh motion. I would appreciate if you could help me how to write the UDF file or expression.
  
  Thank you!
- October 24, 2023 at 8:42 pm
  
  Federico Alzamora Previtali
  Ansys Employee
  
  You can use an expression for the velocity, such as
  IF(t>=5[s],5 [m/s],0 [m/s])

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