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

Getting error in CFX solver manager

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 31, 2012, 06:43
Lightbulb Getting error in CFX solver manager
  #1
Member
 
sunil
Join Date: Jul 2012
Location: Bangalore
Posts: 89
Rep Power: 5
sunilpatil is on a distinguished road
Hello,
i am trying to simulate 3D model of fluid flow(velocity=2m/s) over a flat plate(thickness=5mm,length=100mm.width=100mm) while running in CFX solver i am getting following error
****** Notice ****** |
| A wall has been placed at portion(s) of an OUTLET |
| boundary condition (at 3.0% of the faces, 0.1% of the area) |
| to prevent fluid from flowing into the domain. |
| The boundary condition name is: OUTLET. |
| The fluid name is: Fluid 1. |
| If this situation persists, consider switching |
| to an Opening type boundary condition instead.
how to fix this error
sunilpatil is offline   Reply With Quote

Old   July 31, 2012, 08:16
Default
  #2
Senior Member
 
flotus1's Avatar
 
Alex
Join Date: Jun 2012
Location: Germany
Posts: 1,098
Rep Power: 19
flotus1 will become famous soon enoughflotus1 will become famous soon enough
The problem is obvious: there is a backflow at the position of your outlet.
A pressure outlet cannot handle this, so parts of the outlet are treated as a wall. If the warning message vanishes before your computation converges, then you can live with it. Check the results carefully though.

To prevent this error, move the pressure outlet further downstream to a position where no backflow occurs. This provides less uncertainties than using an opening instead of the pressure outlet like the warning message suggests.
flotus1 is offline   Reply With Quote

Old   July 31, 2012, 19:03
Default
  #3
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,805
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
This question has been asked so much it is getting very tedious. Alex, do you want to write an FAQ to cover it? (http://www.cfd-online.com/Wiki/Ansys_FAQ)
ghorrocks is offline   Reply With Quote

Old   August 1, 2012, 09:24
Default
  #4
Senior Member
 
flotus1's Avatar
 
Alex
Join Date: Jun 2012
Location: Germany
Posts: 1,098
Rep Power: 19
flotus1 will become famous soon enoughflotus1 will become famous soon enough
Sure, I can give it a try.

Edit: so I finally did it. Sorry for editing my contribution so often

Last edited by flotus1; August 1, 2012 at 10:52.
flotus1 is offline   Reply With Quote

Old   August 1, 2012, 18:51
Default
  #5
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,805
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
Looks good, thanks.
ghorrocks is offline   Reply With Quote

Reply

Tags
switching to an opening

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
thobois class engineTopoChangerMesh error Peter_600 OpenFOAM 4 August 2, 2014 09:52
CFX solver doesn't start through Workbench oj.bulmer CFX 3 June 30, 2012 08:44
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 15:45
error message from solver manager rystokes CFX 2 June 12, 2009 06:54
problem in CFX solver about isolated volumes Yuan CFX 2 August 16, 2004 22:54


All times are GMT -4. The time now is 01:08.