CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Parallel processing results using FLUENT (http://www.cfd-online.com/Forums/fluent/105471-parallel-processing-results-using-fluent.html)

haihek July 31, 2012 17:31

Parallel processing results using FLUENT
 
Hi,

Can anyone explain to me why i get somehow little different simulation results when i use single processor instead of parallel?

Any explanation will be helpful, and if you have references for that, that will be great!

Thank you.

BMCombustor August 1, 2012 15:43

Quote:

Originally Posted by haihek (Post 374676)
Hi,

Can anyone explain to me why i get somehow little different simulation results when i use single processor instead of parallel?

Any explanation will be helpful, and if you have references for that, that will be great!

Thank you.

How many licenses are you using? If you have only one valid license and run your case on parallel, it won't make any difference.

Bionico August 2, 2012 02:10

Hi,
I think it's quite usual finding this difference: moreover, if you try the same simulation on the same workstation you'll have different results...of course the differences should be very very small
The computer schedules its processors and their conditions are different every time :)

amirokhovat August 5, 2012 07:55

your license is not valid
I had this problem my calculation with 6 core was true but with 4 was false and with single was true.
you can change the number of cpu core and look which will true.


All times are GMT -4. The time now is 16:05.