Property setting for 2D cylinder model

- July 13, 2020 at 7:36 am
  
  Daicha
  Subscriber
  
  I am trying to simulate 2D cylinder flow as shown on the follwing image.
  
  Should i set these types of prolbem as 2D problem before composing geometry ?? (Right click on gometry tab on workbench, then click property and change analysis type to "2D)
  
  If yes, are there any rules when writing UDF for 2D problems ??
  
  I am using UDF for 3D cylinder problem and it worked in 3D problem. But, it didn't work well when solving 2D problem for the same cylinder.
- July 13, 2020 at 11:00 am
  
  DrAmine
  Ansys Employee
  
  Yes.
  
  Yes there are rules for things related to volume and area especially if axis-symmetric. The customization manual is good resource for that.
- July 14, 2020 at 5:31 am
  
  Daicha
  Subscriber
  
  Anime, thak you so much for your comments.
  
  I have one more question. Should I solve this problem introducing axis-symmetric boundary condition at central axis ??
  
  Best regards
- July 14, 2020 at 6:16 am
  
  DrAmine
  Ansys Employee
  
  Yes.
- July 15, 2020 at 12:14 pm
  
  Daicha
  Subscriber
  
  Thank you
- July 15, 2020 at 2:43 pm
  
  DrAmine
  Ansys Employee
  
  Welcome! Please mark as "Is Solved"