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

Fluent post-processing speed up

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 1, 2008, 09:06
Default Fluent post-processing speed up
  #1
Ale
Guest
 
Posts: n/a
Hi,

I have to manage quite big Fluent models (~12 Million Cells), and I find the post-processing extremely slow.

Could you please suggest me the minimum HW requirements (n of processors, RAM) to make the post-processing time acceptable, and any trick that would help to speed up this activity?

Thank you very much in advance.

Regards,

Ale
  Reply With Quote

Old   July 1, 2008, 15:51
Default Re: Fluent post-processing speed up
  #2
BastiL
Guest
 
Posts: n/a
In generally parallel postprocessing does not always speed up the process. Decomposition is required which takes lots of time. It is quite normal that large models take some time to process. In general you hould consider using journal-scripting for that.

Regards
  Reply With Quote

Old   July 3, 2008, 06:06
Default Re: Fluent post-processing speed up
  #3
Volker Pawlik
Guest
 
Posts: n/a
Is it the graphics performance you are not satisfied with or the time for calculation alpha-numeric values or even both?

In case 1: Sometimes OpenGL acceleration helps. (/display/set/rendering-optins/driver; switch off all fluent graphic windows before)

Unfortunately it is only offered for 32-bit Linux systems not for 64 and the latest implementation in Fluent 12 beta seems not to accelerate at all.

In case 1 and 2: I observed acceleration in parallel mode. Not always but most of the time.

For 12 million cells including only turbulence (no species or radiation) you should spend at least 12 GB RAM in seriell mode and up to 16GB or even more in parallel.

Watch your system with "free" or "vmstat" whether it is swapping. If it does all the processes are extremly deaccelerated (factors of 10 are quite normal)

  Reply With Quote

Reply

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
Fluent Post Processing Kulasekharan N FLUENT 0 February 18, 2008 03:54
Post processing in fluent carno FLUENT 0 July 19, 2007 00:59
Post processing in fluent Jackie FLUENT 1 July 10, 2006 04:45
fluent for post processing James FLUENT 0 April 21, 2006 04:43
about post-processing of fluent lingo FLUENT 6 August 27, 2002 21:34


All times are GMT -4. The time now is 20:52.