CFD Online Logo CFD Online URL
Home > Forums > FLUENT

unsteady state calculation with adaptive time step

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

LinkBack Thread Tools Display Modes
Old   November 7, 2007, 02:26
Default unsteady state calculation with adaptive time step
Posts: n/a
I have been using coupled solver for unsteady state calculation with adaptive time step. I find that the time step becomes very small (1x10e-08 seconds) and so it takes unusually long time to compute. Is there way to achieve convergence with a larger step size. Is linearization of the source term possible. Also can we fix the lower limit of the scalar variables i.e say it should always be positive. sm
  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
Adding heat source to chtMultiRegionFoam maddalena OpenFOAM Programming & Development 60 June 24, 2017 08:01
Time step size and max iterations per time step pUl| FLUENT 31 August 21, 2015 04:46
time step of unsteady particle tracking! winnie FLUENT 2 April 20, 2011 08:08
time step in steady state naveen_010 Main CFD Forum 3 February 3, 2011 20:49
unsteady calcs in FLUENT Sanjay Padhiar Main CFD Forum 1 March 31, 1999 12:32

All times are GMT -4. The time now is 18:44.