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

How to Accurately Determine Convergence Criteria

Register Blogs Community New Posts Updated Threads Search

Like Tree2Likes
  • 2 Post By FMDenaro

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   July 16, 2019, 21:25
Default How to Accurately Determine Convergence Criteria
  #1
New Member
 
Join Date: Jul 2019
Posts: 27
Rep Power: 6
Bran is on a distinguished road
Hello,

When solving your model, you must specify convergence criteria. I am just wondering how can I determine a suitable number for that.

Thank you.
Bran is offline   Reply With Quote

Old   July 17, 2019, 03:27
Default
  #2
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,773
Rep Power: 71
FMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura about
Quote:
Originally Posted by Bran View Post
Hello,

When solving your model, you must specify convergence criteria. I am just wondering how can I determine a suitable number for that.

Thank you.

As a general rule, you check the normalized residual of the equation. When it is at least 4-5 orders of magnitude of the initial one you can consider convergence
selig5576 and Bran like this.
FMDenaro is offline   Reply With Quote

Reply


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
[swak4Foam] transient convergence criteria Hiroshiman OpenFOAM Community Contributions 14 April 8, 2015 13:45
Time step size & convergence absolute criteria yuitsang FLUENT 5 April 15, 2013 04:27
Convergence criteria PrandtlGlawert Main CFD Forum 1 August 13, 2009 17:13
Convergence of CFX field in FSI analysis nasdak CFX 2 June 29, 2009 01:17
CAVITATION (convergence criteria & discretization) ROOZBEH FLUENT 1 October 6, 2003 09:32


All times are GMT -4. The time now is 02:24.