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

time step and iterations in steady state problem using transient solver

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 14, 2010, 06:08
Question time step and iterations in steady state problem using transient solver
  #1
New Member
 
Join Date: Jun 2009
Posts: 22
Rep Power: 17
jing113cn is on a distinguished road
I am using the transient solver for a steady state problem. Whether the time step and iterations per time step can effect the final results ? I want to know if I can use a large time step and 1 iteration per time step to reach the steady state.
jing113cn is offline   Reply With Quote

Old   January 14, 2010, 21:19
Default
  #2
Senior Member
 
herntan's Avatar
 
YH Tan
Join Date: Mar 2009
Location: Malaysia
Posts: 119
Rep Power: 17
herntan is on a distinguished road
ur question answer can be vary from case to case.
If u understand what u trying to simulation, u should know how long it takes to have everything reach steady.
for example, u got a simulation which happen very fast and ended in 1second, u should try to set ur time step 0.1 sec or less to see what happen in that 1 second. as u can see, its depend on ur simulation.
__________________
Herntan,

Add Reputation if I am right
herntan is offline   Reply With Quote

Old   January 15, 2010, 04:18
Default
  #3
Senior Member
 
Philipov's Avatar
 
Svetlin Filipov
Join Date: Mar 2009
Location: United Kingdom
Posts: 176
Rep Power: 17
Philipov is on a distinguished road
Reach conversion criteria during iterations.... if the flow pattern does not change.... you can take this as a final solution
Philipov 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
How to write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 16:33
Differences between serial and parallel runs carsten OpenFOAM Bugs 11 September 12, 2008 12:16
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 03:58
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07


All times are GMT -4. The time now is 02:58.