UDF

- March 8, 2023 at 8:45 am
  
  fatima Zmim
  Subscriber
  
  Hellow everyone I want to simulat water temperature insid cylidre (3D). This cylindre insid box with user defined function . But I have the divergence probleme for temperature. when i start my simulation i recieved message "Turbulence velocity limited to viscosity ratio of 1000000e+05). I try to run calculat with application boundary condition (convection and radiation ) without using UDF i noticed computational stabilization.
  iS it that he use "user defined function influence he calculation for fluid simulation ?
  So please help me to find another way to apply source without using user define function
- March 8, 2023 at 9:42 am
  
  Rob
  Ansys Employee
  
  What does the UDF do? That's usually a good starting point for troubleshooting. The viscosity ratio warning can be ignored, but it's cause needs to be understood (clue, look at the flow field).
- March 8, 2023 at 11:48 am
  
  fatima Zmim
  Subscriber
  
  thank you for your reply
- March 8, 2023 at 11:53 am
  
  fatima Zmim
  Subscriber
  
  my problem is i find values does not make sense for temperature
- March 8, 2023 at 1:48 pm
  
  Rob
  Ansys Employee
  
  OK, but what does the UDF do? That'll guide us towards a solution.

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