CFX domain reference pressure

jthiakz · August 15, 2014, 12:49

Even though pressure BCs are imposed in CFX-setup, additionally if I keep some reference pressure value in CFX-domain setting , will it help in better pressure prediction in solution.

Since I use reference pressure, I recalualted the gauge pressure value and imposed @ inlet
# Note pressure units are in [psi]

ghorrocks · August 17, 2014, 07:33

I do not understand your question.

But if you are asking about how to set the reference pressure - there are lots of threads on this topic on the forum, do a search to find them.

jthiakz · August 17, 2014, 10:37

Is it better to provide some value in reference pressure instead of keeping it as zero.

ghorrocks · August 17, 2014, 19:25

Yes. It is important that the reference pressure is a typical absolute pressure value in the simulation to minimise numerical round off errors.

August 15, 2014, 12:49	CFX domain reference pressure	#1
jthiakz Member Thiagu Join Date: Oct 2012 Location: India Posts: 60 Rep Power: 14	Even though pressure BCs are imposed in CFX-setup, additionally if I keep some reference pressure value in CFX-domain setting , will it help in better pressure prediction in solution. Since I use reference pressure, I recalualted the gauge pressure value and imposed @ inlet # Note pressure units are in [psi]

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August 17, 2014, 07:33		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	I do not understand your question. But if you are asking about how to set the reference pressure - there are lots of threads on this topic on the forum, do a search to find them.

August 17, 2014, 10:37		#3
jthiakz Member Thiagu Join Date: Oct 2012 Location: India Posts: 60 Rep Power: 14	Is it better to provide some value in reference pressure instead of keeping it as zero.

August 17, 2014, 19:25		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	Yes. It is important that the reference pressure is a typical absolute pressure value in the simulation to minimise numerical round off errors.