CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Fluent 6.3 on a Linux cluster (http://www.cfd-online.com/Forums/fluent/47276-fluent-6-3-linux-cluster.html)

cfd_newbie February 8, 2008 10:29

Fluent 6.3 on a Linux cluster
 
Hi,

I'm working on a Linux cluster 32 bits, 5 nodes at 1.7 GHz and 2 GB of RAM on each node, the Fluent version is 6.3.

Well, I've done the same calculation on my Core Duo laptop 1.6 GHz and 2 GB of RAM, Linux on 32 bits - a simple 2D calculation, and ... the solution converged faster on my laptop.

This is something normal ? I mean a five nodes cluster should be much faster than my laptop.

Thanks in advance.


Phil February 8, 2008 10:50

Re: Fluent 6.3 on a Linux cluster
 
What is the cell count? Very low cell counts dont scale well over a cluster. You need >100k cells per cpu core.

mAx February 8, 2008 10:54

Re: Fluent 6.3 on a Linux cluster
 
not necessary you should use your cluster with 3d calculations or with a minimum of cells. try the same with a 3d model, you should see the difference


cfd_newbie February 8, 2008 11:01

Re: Fluent 6.3 on a Linux cluster
 
I use for this problem a very dense mesh 300000 cells, your suggestion is to use only 3 processors for the job ?


Phil February 8, 2008 12:09

Re: Fluent 6.3 on a Linux cluster
 
I dont bother with parallel under 300k cells PER CORE i.e. minimum 600k cells per dual core machine.


All times are GMT -4. The time now is 10:31.