Does operating pressure affect the solution?

- August 6, 2023 at 9:45 am
  
  goktug.yilmaz
  Subscriber
  
  Hi all,
  I normally set the gauge pressure and use 0 for operating pressure. However, I realized that I forgot to set operating pressure to 0 for some of my simulations. Should I perform these simulations again? Or 1 iteration after adjusting the pressure setting will be enough?
  Best regards
- August 7, 2023 at 4:19 am
  
  Essence
  Ansys Employee
  
  Hello,
  Which version of Fluent are you using? The operating pressure in Fluent is always set to the default 101325 Pa which is 1 atm. The results you obtained will be always regarding the absolute pressure = guage + operating (atm pressure). Therefore, if you forgot to set operating pressure to 0, I don't think that it will be a problem, if the absolute pressure value itself is intended. But if you have input the absolute pressure as a guage pressure in the BCs, then I think you might need to re-run the simulation.
- August 7, 2023 at 4:42 am
  
  goktug.yilmaz
  Subscriber
  
  Thank you for your answer. Yes, I entered the absolute pressure as gauge pressure. Therefore, operating pressure must be zero. However I just forgot to set it zero.
- August 7, 2023 at 5:44 am
  
  Essence
  Ansys Employee
  
  Then I think you might need to re-run the simulation as the BCs were not appropriate.

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