|December 14, 2007, 16:15||
solver settings, residuals plateau for a long time
I have a question regarding solver settings in the k-e model with all of the default settings. I have a case that is primarily pipe flow. I setup my case of about 500000 nodes and allow it calculate. I am using scalable wall functions and acceptable yplus values. And, my results look great.
My question is that of time. When I start the case, it iterates for approximately 60 iterations with the residuals falling to levels of about 1.5E-04 then the residuals begin to level out. It then can take 100 more iterations to go down to the default threshold of 1E-04. The curve is monotonic and well behaved.
Does anyone know of a setting that can be used to help remove this asymptotic behavior and allow the solution to converge to accpetable levels sooner. Or, does anyone have experience with a case that behaves as explained, and know if ending the case early is an acceptable solution to saving time?
Thanks in advance for you help.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Hydrostatic Pressure and Gravity||miliante||OpenFOAM Running, Solving & CFD||132||October 7, 2012 23:50|
|Settings in Solver Control||Roland R||CFX||1||October 12, 2011 07:44|
|Upgraded from Karmic Koala 9.10 to Lucid Lynx10.04.3||bookie56||OpenFOAM Installation||8||August 13, 2011 05:03|
|Computational time||sunnysun||OpenFOAM Running, Solving & CFD||5||March 16, 2009 05:32|
|Differences between serial and parallel runs||carsten||OpenFOAM Bugs||11||September 12, 2008 12:16|