Pressure outlet -- CFD Online Discussion Forums

September 29, 2021, 05:31	Pressure outlet	#1
Klavoir New Member Join Date: Sep 2021 Posts: 22 Rep Power: 4	Hi, In my simple case, I have a pipe with at the end 4 branches. I want to calculate the pressure drops in the system. I want to specify a mass flow inlet. Can I specify 4 outflow boundary conditions at the exits? Or should I use one pressure outlet at an exit (with zero pressure) and 3 outflow boundary conditions so that there is gauge pressure defined somewhere in the domain? If I dont have any pressure outlet defined it seems Fluent doesn't know the absolute pressure level anywhere?

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