CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS

Difference in results with different "Processing options" (Core)

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

LinkBack Thread Tools Search this Thread Display Modes
Old   July 17, 2017, 13:34
Question Difference in results with different "Processing options" (Core)
New Member
Ferdinand Allmendinger
Join Date: Jul 2017
Posts: 1
Rep Power: 0
Elmo11 is on a distinguished road

I have been searching the Net for a couple hours, but didn't find anything about this.
So when I use Fluent with the totally same settings but different core settings (Serial/Parallel with 1, 2, 4, 6 or 8 Cores) I never get the same results. Sometimes the residuals converge, diverge or just stay constant. I'm not sure if this is a problem or which settings I should trust. If I use the same core settings the results are also nearly (95%) the same.

I have an Core I7 with 4 cores and HT but it doesn't matter. This problem also occur on different PCs with different meshes (last pic with 12 cores).


1 Core (Serial)

2 Cores (Parallel)

4 Cores (Parallel)

8 Cores (Parallel)

Again with 8 Cores (Parallel)

12 Cores (Parallel)

Please I need help with this. Maybe someone had an explanation or a solution for this phenomenon...
Elmo11 is offline   Reply With Quote


core, parallel calculation, serial parallel multicore

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
mpirun, best parameters pablodecastillo Hardware 18 November 10, 2016 12:36
Different Results from Fluent 5.5 and Fluent 6.0 Rajeev Kumar Singh FLUENT 6 December 19, 2010 11:33
difference in results between 2D and 3D Michelle CFX 3 December 10, 2007 01:59
Difference results between Steady and Unsteady? Giang T Vu FLUENT 6 May 22, 2004 06:37
Difference in results using different Mesh? Julie FLUENT 7 July 2, 2002 10:28

All times are GMT -4. The time now is 13:39.