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

Hey,

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).

E.g.

1 Core (Serial)
http://up.picr.de/29820883nr.jpg

2 Cores (Parallel)
http://up.picr.de/29820884ba.jpg

4 Cores (Parallel)
http://up.picr.de/29820885up.jpg

8 Cores (Parallel)
http://up.picr.de/29820886lu.jpg

Again with 8 Cores (Parallel)
http://up.picr.de/29820887no.jpg

12 Cores (Parallel)
http://up.picr.de/29820988jr.jpg




Please I need help with this. Maybe someone had an explanation or a solution for this phenomenon...