CFD Online Logo CFD Online URL
Home > Forums > FLUENT


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

LinkBack Thread Tools Display Modes
Old   October 5, 2001, 07:53
Default convergence
Posts: n/a
  Reply With Quote

Old   October 9, 2001, 19:49
Default Re: convergence
Chetan Kadakia
Posts: n/a
where is your question?
  Reply With Quote

Old   October 10, 2001, 04:06
Default Re: convergence
Posts: n/a
Hello! I'm sorry for last message, but I had a problem with sending it.

I wrote my case early, so now I will only remind it in a few words. I have a problem with my simulation, exactly with convergence.I have a very high residuals. I'm modeling liquid-liquid systems (dispersion)in the static mixers. The first fluid is a water and the second one is an engine-oil, with the density 920 [kg/m^3]. I use an Algebraic Slip Model in Fluent 5.4. The flow is turbulence, so I have also two additional parameters: k and epsilon. I tried to solve my problem many times and to do this I made many steps. Once I changed the solve controls, I decreased them to the level about 1e-03. But it doesn't help.Last time I started my calculation from 1e-06 for k and epsilon and the another parameters for example slip velocity about 1e-04. Unfortunatly I haven't got a solution. Also I should tell that I modeling this case for laminar flow and I obtain a solution very quicly. So I can't understand my problems with this case. I know that the main problem is with the k and epsilon. To simulation I use the "multigrid solver". I know that it isn't easy case because I have very complicate static mixers, but what should I do to obtain a convergence. At the moment I try to solve my case modeling only with turn on flow, volume fraction and slip velocity in the "solve controls" without turbulence. At the moment I can not say if it will help, because it require a time. I would appreciate any suggestions! Thanks! Best regards! Paulina
  Reply With Quote


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
Convergence Centurion2011 FLUENT 44 June 20, 2017 09:57
problem with Min/max rho tH3f0rC3 OpenFOAM 7 February 23, 2013 06:37
Force can not converge colopolo CFX 13 October 4, 2011 22:03
Convergence of CFX field in FSI analysis nasdak CFX 2 June 29, 2009 01:17
Defect correction and convergence ganesh Main CFD Forum 4 June 30, 2006 14:20

All times are GMT -4. The time now is 00:08.