CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > FLOW-3D

How make F3D to reduce a time step many times down to dtmin?

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 16, 2009, 10:37
Default How make F3D to reduce a time step many times down to dtmin?
  #1
New Member
 
gennady Markelov
Join Date: Dec 2009
Posts: 3
Rep Power: 16
gennady is on a distinguished road
When a number of iterations reaches the maximum limit, F3D reduces time step or declare nonconvergence. I use very small value for the minimum time step limit, however, F3D never reduced time step down to this limit. Moreover, a number of time step reductions can be just one before nonconvergence despite that the time step is still much larger than the limit.
What controls a number of time step reductions? How to make F3D to reduce a time step many times until its value reaches the minimum limit?
Thank you.
gennady is offline   Reply With Quote

Old   January 28, 2010, 13:12
Default
  #2
Member
 
Join Date: Jan 2010
Posts: 39
Rep Power: 16
ignatz is on a distinguished road
Gennady, Have you tried contacting Flow Science, F3D's developer?
ignatz 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
Transient simulation not converging skabilan OpenFOAM Running, Solving & CFD 14 December 17, 2019 00:12
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 07:20
Intermediate step during a time step Burn OpenFOAM 0 July 16, 2009 11:01
guidelines on time step Effendi Ali FLUENT 3 February 4, 2004 08:50
unsteady calcs in FLUENT Sanjay Padhiar Main CFD Forum 1 March 31, 1999 13:32


All times are GMT -4. The time now is 19:35.