Mass Flow and Pressure

EminDikici · March 15, 2020, 04:45

Hi Guys,

How can I enter both mass flow and pressure?

ghorrocks · March 15, 2020, 05:09

If you are asking how can you set a boundary condition where both mass flow rate and pressure set - well, you can't. In CFX the normal approach when you are an inlet and an outlet is to set one as a pressure boundary and the other as a mass flow rate boundary. This achieves the same thing. But if your situation is more complex than this it might not be possible.

EminDikici · March 15, 2020, 05:22

Quote:

Originally Posted by ghorrocks

If you are asking how can you set a boundary condition where both mass flow rate and pressure set - well, you can't. In CFX the normal approach when you are an inlet and an outlet is to set one as a pressure boundary and the other as a mass flow rate boundary. This achieves the same thing. But if your situation is more complex than this it might not be possible.

Okay I am clear. Thank you so much.

March 15, 2020, 04:45	Mass Flow and Pressure	#1
EminDikici New Member Muhammed Emin Dikici Join Date: Mar 2019 Posts: 13 Rep Power: 7	Hi Guys, How can I enter both mass flow and pressure?

March 15, 2020, 05:09		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	If you are asking how can you set a boundary condition where both mass flow rate and pressure set - well, you can't. In CFX the normal approach when you are an inlet and an outlet is to set one as a pressure boundary and the other as a mass flow rate boundary. This achieves the same thing. But if your situation is more complex than this it might not be possible. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
boundary condition with pressure AND mass flow rate	tsi07	FLUENT	3	April 14, 2022 12:32
Field Function script for varying Mass Flow Rate based on LOCAL Pressure	Aeromidd	STAR-CCM+	1	August 9, 2017 19:17
How to manage the pressure term in fixed mass flow rate based channel flow simulation	sjwon1991	Main CFD Forum	5	July 10, 2017 07:21
pressure input, mass flow output	Venugopal Bachu	Main CFD Forum	0	January 11, 2007 10:01
Terrible Mistake In Fluid Dynamics History	Abhi	Main CFD Forum	12	July 8, 2002 09:11