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-   -   How to run a parallel simulation? (http://www.cfd-online.com/Forums/fluent/41047-how-run-parallel-simulation.html)

J.Gimbun May 20, 2006 15:38

How to run a parallel simulation?
 
Hi Fluent user, Is anybody know how to run a parallel simulation on single workstation with dual Xeon processor (both processor are dual core). I know how to assign the parralel simulation on cluster pc in which I can assign each partition to each cluster but not in single workstation. I just have no idea to assign my partition to each processor. Thanks in advance.

Jaywlaker May 20, 2006 17:32

Re: How to run a parallel simulation?
 
It is not possible, a dual core is like 1 processor for fluent code

Pete May 20, 2006 21:30

Re: How to run a parallel simulation?
 
You are misinformed. Dual core Xeons can give increased performance when you run fluent with the following switches:

fluent 2ddp -t2 -psmpi


Mac May 20, 2006 21:31

Re: How to run a parallel simulation?
 
If both CPUs are dual core, use the fluent -t4 -psmpi switch.

J.Gimbun May 21, 2006 04:57

Re: How to run a parallel simulation?
 
Thanks all for reply. I have 2 processors in my CPU and both are dual core Xeon. I'm dealing with 3D simulation so can I use fluent-t4-psmpi switch? If so do you have any idea how to run such simulation? Thanks in advance

Mac May 21, 2006 07:02

Re: How to run a parallel simulation?
 
fluent 3ddp -t4 -psmpi

should do it.

J.Gimbun May 21, 2006 13:14

Re: How to run a parallel simulation?
 
Hi Mac, I try to run 3ddp -t4 -psmpi but I only get the message 'cannot read directory'. Anyway I'm working on Windows XP pro machine. Do you have any idea how can I run a parallel fluent solver in windows.

Aissa May 21, 2006 13:42

Re: How to run a parallel simulation?
 
Just try "C:\Fluent.Inc\ntbin\ntx86\fluent.exe 3d -t4". It should work !

J.Gimbun May 21, 2006 13:57

Re: How to run a parallel simulation?
 
Thanks for your suggestion anyway I just couldn't run it at all. Is it possible that my Fluent installation incomplete or didnt include the parallel fluent? If so then I will ask our primary license holder about it. Regards,

joaquin May 24, 2006 05:47

Re: How to run a parallel simulation?
 
I've a workstation with two intel Xeon Processors (with hyperthreading(two phisical processors but four processors appear in windows, there are two virtual ones). To run parallel fluent, i had to disable the hyperthreading, on the server board and then execute cmd and in the dos window run fluent 3d -t2. So if you have two core duo processors, i think you must try to run fluent 3d -t2.


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