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

how can I speed up unsteady simulation

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 4, 2009, 10:59
Question how can I speed up unsteady simulation
  #1
New Member
 
Avinash
Join Date: Nov 2009
Posts: 2
Rep Power: 0
Avinash_Chandra is on a distinguished road
Dear all,
My unsteady flow simulation taking around 2 months to converged the solution. How can I reduced CPU time for unsteady problem?
Thanks.
Avinash_Chandra is offline   Reply With Quote

Old   November 4, 2009, 14:05
Default
  #2
Member
 
Ivan
Join Date: May 2009
Posts: 85
Rep Power: 17
ivanbuz is on a distinguished road
how big is the grid?

just my two cents, try
* use smaller grid solution to initialize the big grid. (search "interpolation file" in manual)
* use biger time steps to develop the flow for a while, then switch to smaller time step.
* use parallel computation.
* use implicit solver
ivanbuz is offline   Reply With Quote

Old   November 6, 2009, 02:33
Smile thanks ivanbuz.
  #3
New Member
 
Avinash
Join Date: Nov 2009
Posts: 2
Rep Power: 0
Avinash_Chandra is on a distinguished road
thanks ivanbuz.
Avinash_Chandra is offline   Reply With Quote

Reply

Tags
convergence, laminar, unsteady


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
Unsteady vs Steady simulation - any difference? Sally Main CFD Forum 16 December 16, 2005 10:15
low speed compressible two phase flow?? cat CFX 0 November 15, 2005 08:59
unsteady simulation airfoil ramin FLUENT 8 September 14, 2005 20:56
Procedure to run unsteady simulation? STN Main CFD Forum 2 February 16, 2002 05:37
1D simulation of unsteady gas flows in pipelines Andrew Chernousov Main CFD Forum 1 September 5, 1998 00:42


All times are GMT -4. The time now is 16:48.