CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Some Questions about GAMG

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 10, 2009, 18:03
Default Hi FOAMERS, I am currently
  #1
Senior Member
 
BastiL
Join Date: Mar 2009
Posts: 530
Rep Power: 20
bastil is on a distinguished road
Hi FOAMERS,

I am currently doing some numerical studies and I have some questions about the 1.5 GAMG:

1. Is it still possible to specify maximum iteration number as for amg before? Default seems to be 1000 which takes years....

2. I sometimes see a run switching from less than 20 to 1000 GAMG iterations from one iteration to the next (simpleFoam) WHat can this be caused by? Initial and final residuals look very similar.

Thanks BastiL
bastil is offline   Reply With Quote

Old   March 2, 2009, 03:59
Default A pity, nobody seems to know t
  #2
Senior Member
 
BastiL
Join Date: Mar 2009
Posts: 530
Rep Power: 20
bastil is on a distinguished road
A pity, nobody seems to know this? Do I have to edit the source for this? The first topic is still of interest for me.

Regards
bastil is offline   Reply With Quote

Old   March 2, 2009, 04:21
Default Hello Bastil, For point 1,
  #3
Senior Member
 
Vincent RIVOLA
Join Date: Mar 2009
Location: France
Posts: 283
Rep Power: 18
vinz is on a distinguished road
Hello Bastil,

For point 1, normaly specifying "maxIter N;" in your fvSOlution file works even with GAMG. At least, it works for me.
For point 2, I would say that your simulation is simply blowing up, which is shown by the large differences in behaviour you noticed.

Regards,

Vincent
vinz is offline   Reply With Quote

Reply

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
GAMG solver in OpenFOAM 14 msrinath80 OpenFOAM Running, Solving & CFD 4 November 10, 2015 02:59
GAMG Solver tutlhino OpenFOAM Running, Solving & CFD 5 January 26, 2013 17:01
Mathematical Basics for GAMG joern OpenFOAM 6 December 18, 2008 03:17
Useing GAMG sivakumar OpenFOAM Running, Solving & CFD 1 October 20, 2008 07:40
A couple of questions about GAMG piotr OpenFOAM Running, Solving & CFD 0 April 23, 2008 08:09


All times are GMT -4. The time now is 06:35.