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Negative static gauge pressure in the domain while using ideal Gas law

- March 20, 2024 at 10:47 am
  
  Nitish Palanna
  Subscriber
  
  Hello there! I am running transient CFD simulation for a vehicle ideal gas law and the energy equation and I seem to be getting a negative gauge static pressure in the whole domain, even though the reference pressure in the domain was initialized to the atmospheric pressure. Does anyone have suitable explanation and a possible solution for this occurrence? Thanks!
- March 20, 2024 at 3:22 pm
  
  Rob
  Forum Moderator
  
  What have you set for the operating and boundary pressure? What sort of vehicle?
- March 20, 2024 at 3:26 pm
  
  Nitish Palanna
  Subscriber
  
  Hey! The operating pressure is set to 1 atm and the boundary gauge pressure is set to 0 Pa. The vehicle resembles a minivan and the inlet velocity is around 130 kmph.
- March 20, 2024 at 3:55 pm
  
  Rob
  Forum Moderator
  
  Can you zoom out? If you've set the outlet pressure as zero gauge, what is the operating density?

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