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

 November 1, 2002, 22:04 Advice for convergence problem #1 David Guest   Posts: n/a Hi, everybody. I am simulating a gas/liquid two-phase multicomponents flow with reactions in liquid phase. After 70 steps, the solver was terminated with overflow errors. Could anybody please give me some advice how to get a converged solution? Many thanks. David

 November 1, 2002, 22:56 Re: Advice for convergence problem #2 Mike Guest   Posts: n/a Need some more details really... If you look at the results before the solver overflows (maybe at the 60th iteration) what do they look like? Is there a particular location where it looks totally unrealistic (maybe you get huge velocities near an inlet?). What's the physics setup (which multiphase models, drag models), what type of flow is it (e.g dispersed gas in a continuous liquid?). Mike

 November 2, 2002, 04:29 Re: Advice for convergence problem #3 David Guest   Posts: n/a Thanks a lot, Mike. Yes, the flow is a dispersed gas in a continuous liquid in a pipe. The inlet velocity is very slow, about 0.7cm/sec. I use Schiller Naumann Drag model. Regards David

 November 2, 2002, 14:26 Re: Advice for convergence problem #4 Mike Guest   Posts: n/a That is slow - what's the Reynolds Number? Could it be Laminar flow but you are applying a turbulence model? Mike

 November 3, 2002, 04:00 Re: Advice for convergence problem #5 David Guest   Posts: n/a Good suggestion, I'll try. Thanks Mike. David

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post fatb0y CFX 3 January 14, 2012 20:42 Kai_kc FLUENT 1 October 27, 2010 05:29 Se-Hee CFX 2 June 10, 2007 06:29 sudha FLUENT 3 April 28, 2004 08:40 joon Siemens 5 September 14, 2003 00:06

All times are GMT -4. The time now is 17:23.