Fluent Pressure Outlet Boundary Condition

- August 30, 2017 at 4:10 pm
  
  pjuangph
  Subscriber
  
  Fluent version 18+ gives us more options for specifying pressure outlet. What is the difference between Total Pressure and Static Pressure outlet boundary condition? Shouldn't the pressure outlet always be static? Can you please explain the difference and also what option fluent 17 and below use?
- September 4, 2017 at 7:26 pm
  
  Holger Grotjans
  Ansys Employee
  
  Hi, you are looking here at the "backflow" pressure. This is the pressure specified when you have backflow, i.e. inflow at the outlet. By using Total Pressure you will automatically have a static pressure which is smaller than the Gauge pressure, as Ptot=P+Pdyn, hence promoting the flow out of the domain instead of inflow.
  
  See section 6.3.9.1.3 in the documentation for details.