Problem with UDF

- December 13, 2019 at 9:02 pm
  
  andreaimpiombato
  Subscriber
  
  Hello,
  
  I have a problem with the attached UDF.
  
  I need to create a parabolic inlet velocity profile varying in time. The problem is the profile that is generated is parabolic, but the velocity vectors are not directed perpendicularly to all as with x. I show an image for clarity.
  
  Thanks
- December 16, 2019 at 6:15 am
  
  DrAmine
  Ansys Employee
  
  As ANSYS staff I do no ignore attachments. Run for more iterations and check the mesh at inlet.
- December 21, 2019 at 3:11 pm
  
  andreaimpiombato
  Subscriber
  
  The UDF is my inlet condition and must be a parabola that varies the intensity in time .... the calculation is transient.
  
  Best regards,
  
  Andrea
- December 23, 2019 at 11:56 am
  
  Rob
  Ansys Employee
  
  What velocity boundary settings are you using?
- January 7, 2020 at 3:49 pm
  
  andreaimpiombato
  Subscriber
  
  I've used the velocity inlet condition.
  
  I've tried to use the old version of the software. In version 19.2 the UDF works fine.
  
  Thank you very much
  
  Andrea
- January 7, 2020 at 4:35 pm
  
  DrAmine
  Ansys Employee
  
  Probably post processing issue. Can you paste the lines of udf and velocity vectors of both runs.

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