CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Fidelity CFD

pressure far field boundary condition

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

Like Tree1Likes
  • 1 Post By Bdew8556

LinkBack Thread Tools Search this Thread Display Modes
Old   July 7, 2022, 06:16
Default pressure far field boundary condition
New Member
Join Date: Apr 2022
Posts: 9
Rep Power: 3
hussein93 is on a distinguished road
Hey, I am investigating the flow in a turbine with only one stator. For the outlet I would like to set a pressure far field BC, because I don't now the static pressure in the outlet. For this I have extended my domain length by 20 times the chord length of the blade. So how can I set this BC, with external for the outlet ? Sam using Omnis v2,
hussein93 is offline   Reply With Quote

Old   July 18, 2022, 09:19
Default Outlet pressure boundary condition
Senior Member
Join Date: May 2012
Location: Brussels
Posts: 149
Rep Power: 13
colinda1 is on a distinguished road

For an external boundary condition knowledge on the pressure, temperature and velocity is still needed. So this is really mostly useful in far field conditions like the far field far away from an aircraft or a car for example: then the pressure and temperature and velocity direction are known if it is really far from the region of interest and flow field gradients are negligible.

An outlet pressure boundary condition would probably be better in this case.
colinda1 is offline   Reply With Quote

Old   August 11, 2022, 08:35
New Member
Join Date: Aug 2022
Posts: 7
Rep Power: 3
gsgt07 is on a distinguished road
As in such type of cases the time marching boundary condition are used i.e. convective boundary condition and if you don't know the outside pressure in that case pressure gradient BC are implemented i.e. dp/dn = 0;
gsgt07 is offline   Reply With Quote

Old   November 6, 2022, 20:15
Default reply
Senior Member
Join Date: May 2013
Posts: 209
Rep Power: 13
Bdew8556 is on a distinguished road
What exactly is Fluent setting with the Pressure Far Field Boundary Condition? I'm having trouble finding anything definitive. I'm also noting it does not seem to like lower mach numbers. Any thoughts/equations would be fantastic.
colinda1 likes this.
Bdew8556 is offline   Reply With Quote


boundary condition, far field

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
sliding mesh problem in CFX Saima CFX 46 September 11, 2021 08:38
Centrifugal fan j0hnny CFX 13 October 1, 2019 14:55
mapped pressure field as boundary condition sitajeje OpenFOAM Running, Solving & CFD 0 November 24, 2017 12:04
Problem in setting Boundary Condition Madhatter92 CFX 12 January 12, 2016 05:39
Wrong flow in ratating domain problem Sanyo CFX 17 August 15, 2015 07:20

All times are GMT -4. The time now is 09:26.