Using Opening B.C. for both inlet and outlet

SH_P · June 9, 2012, 15:33

Hello friends,
I am going to simulate an oscillating flow in a duct with positive and negative values of velocity in both inlet and outlet.

1. Since I am new to CFX, I am not sure if it makes sense to define both inlet and outlet as Opening, one with prescribed velocity (varying with time) and one pressure?
2. I was used to work with fluent and it was no opening BC there! I will appreciate if someone describe the different between Opening and pressure outlet BC.

Thanks in advance...

ghorrocks · June 11, 2012, 20:15

This is all explained in the CFX documentation.

June 9, 2012, 15:33	Using Opening B.C. for both inlet and outlet	#1
SH_P Member Soroush Join Date: Mar 2010 Posts: 52 Rep Power: 16	Hello friends, I am going to simulate an oscillating flow in a duct with positive and negative values of velocity in both inlet and outlet. 1. Since I am new to CFX, I am not sure if it makes sense to define both inlet and outlet as Opening, one with prescribed velocity (varying with time) and one pressure? 2. I was used to work with fluent and it was no opening BC there! I will appreciate if someone describe the different between Opening and pressure outlet BC. Thanks in advance...

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pulsatile pressure inlet with pressure outlet	a.lynchy	FLUENT	3	March 23, 2012 13:45
ATTENTION! Reliability problems in CFX 5.7	Joseph	CFX	14	April 20, 2010 15:45
Inlet, Outlet, and ... Opening?	PGP	CFX	2	March 27, 2008 09:47
VOF Outlet boundary condition in cfd - ace	JM	Main CFD Forum	0	December 15, 2006 08:07
what the result is negatif pressure at inlet	chong chee nan	FLUENT	0	December 29, 2001 05:13

June 11, 2012, 20:15		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	This is all explained in the CFX documentation.