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

Absolute Pressure and temperature limited to......

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 31, 2007, 14:29
Default Absolute Pressure and temperature limited to......
  #1
Shamoon
Guest
 
Posts: n/a
I am using unstructured mesh of 2.1 Million grid with sea level conditions.

After running 50 iterations Fluent displays the messages like

Abslute Pressure limited to 1.00e00 Temperature limited to 100K Time step reduced in 300 cells

And continued till end (alhough not converged)

What should I do?
  Reply With Quote

Old   August 31, 2007, 15:09
Default Re: Absolute Pressure and temperature limited to..
  #2
Glenn
Guest
 
Posts: n/a
This typically means the solution is going numerically unstable somwhere (may be only for a few of mesh elements)and the solver is struggeling. If the solution is just starting, it may be that the flow field tried to permutate too drastically. You can try to recover by: 1) reducing under-relaxation factors to low values to start a solution... or 2) setting variable limits to more reasonable ranges... 3) "Patching" the pressure and/or temperature region to a more reasonable value.... or 4) examining your mesh for ill-posed mesh (run mesh quality checks in your meshing package)...repair poor mesh as appropriate.
  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
Calculation of the Governing Equations Mihail CFX 7 September 7, 2014 06:27
temperature limited - absolute pressure limited Asashi FLUENT 3 July 18, 2014 09:51
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
why absolute pressure and temperature limited to 1.000000e+00? wildli FLUENT 1 January 28, 2010 02:25
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13


All times are GMT -4. The time now is 13:30.