CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

slow convergence of bounded CDS

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 4, 2018, 17:22
Default slow convergence of bounded CDS
  #1
New Member
 
CFDnerd
Join Date: Aug 2018
Posts: 5
Rep Power: 7
CFDnerd is on a distinguished road
Hello fellow CFD users,


I am running a transient analysis in CFX with SAS SST. During my experimentation, I have observed that the bounded CDS results in a very slow convergence compared to the run "un-bounded" CDS option. I would like to understand reasons of such behavior.
CFDnerd is offline   Reply With Quote

Old   August 4, 2018, 20:14
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,696
Rep Power: 143
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
This is unexpected. I cannot explain that.

But each simulation is different and issues as nebulous as stability are never simple. Your case might be a rare situation where the general rule does not apply.
__________________
Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.
ghorrocks 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
Reaction in porous media - very slow convergence lavdwall FLUENT 0 November 27, 2015 10:14
Slow convergence using mass flow BC vitulaaak CFX 4 November 7, 2012 10:22
Error: Parameter Bounded CDS is not allowed ghoshi1983 CFX 6 January 23, 2012 05:30
Force can not converge colopolo CFX 13 October 4, 2011 22:03
Slow convergence Jesper CFX 1 July 7, 2004 16:59


All times are GMT -4. The time now is 22:10.