CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

CFX domain reference pressure

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   August 15, 2014, 11:49
Default CFX domain reference pressure
  #1
Member
 
Thiagu
Join Date: Oct 2012
Location: India
Posts: 59
Rep Power: 4
jthiakz is on a distinguished road
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]
jthiakz is offline   Reply With Quote

Old   August 17, 2014, 06:33
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,825
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
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.
ghorrocks is offline   Reply With Quote

Old   August 17, 2014, 09:37
Default
  #3
Member
 
Thiagu
Join Date: Oct 2012
Location: India
Posts: 59
Rep Power: 4
jthiakz is on a distinguished road
Is it better to provide some value in reference pressure instead of keeping it as zero.
jthiakz is offline   Reply With Quote

Old   August 17, 2014, 18:25
Default
  #4
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,825
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
Yes. It is important that the reference pressure is a typical absolute pressure value in the simulation to minimise numerical round off errors.
ghorrocks is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
An error has occurred in cfx5solve: volo87 CFX 5 June 14, 2013 17:44
reference pressure and relative pressure in CFX and real gas setting nuimlabib Main CFD Forum 0 October 12, 2010 20:55
RPM in Wind Turbine Pankaj CFX 9 November 23, 2009 05:05
Simulation of a single bubble with a VOF-method Suzzn CFX 18 October 2, 2009 04:18
Hydrostatic pressure in 2-phase flow modeling (long) DS & HB Main CFD Forum 0 January 8, 2000 16:00


All times are GMT -4. The time now is 19:21.