|
[Sponsors] |
December 21, 2016, 23:41 |
OpenFOAM: advice on parallel computing
|
#1 |
Senior Member
|
Hi all,
I'm planning to use OpenFOAM to analyze the following physics: flow in porous zone, probably with rotating mesh (fans), conjugate heat transfer, radiation and combustion. I will deal with a computational domain with 10-20 millions of cells, approximately. As workstation, my intention is to have a total amount of number 2 intel XEON processor with 128GbRAM. What I would like to know is: is it better to have two processor with less total number of cores(8), but higher frequency(3.5GHz)? Or to have a lower frequency rate (2.2Ghz) but higher number of cores (20)? I know that it sounds like:"bird in the hand might be worth two in the bush", but if some user can share his/her experienxe, it will be of help. Thanks. Regards. Michele |
|
December 22, 2016, 04:30 |
|
#2 |
Super Moderator
Alex
Join Date: Jun 2012
Location: Germany
Posts: 3,399
Rep Power: 46 |
The high core count Xeon processors are pretty much a waste of money for CFD workloads. 20 CPU cores will be severely bottle-necked by only 4 memory channels.
The most important thing is to maximize memory throughput first, so choose a Xeon processor that supports DDR4-2400. The rest depends on your budget. The best Xeon processor for CFD right now is the Xeon E5-2687w v4. I had to cheap out a bit on our last workstation so it only has 2 E5-2650v4. But despite the low budget and clock speed it is still considerably faster than our previously fastest workstation. |
|
December 22, 2016, 07:13 |
|
#3 |
Senior Member
|
Thank you very much for the note.
Regards. Michele Sent from my ASUS_X008D using CFD Online Forum mobile app |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Problem met in my DEFINE_GRID_MOTION Macro in parallel computing | aircrafter | Fluent UDF and Scheme Programming | 0 | September 22, 2014 23:58 |
How can i make a parallel programming in OpenFOAM? | jignesh_thaker2007 | OpenFOAM Running, Solving & CFD | 3 | July 2, 2014 09:37 |
unable to run in parallel with OpenFOAM 2.2 on CentOS | einatlev | OpenFOAM Running, Solving & CFD | 9 | June 26, 2014 00:24 |
Problem in Running OpenFoam in Parallel | himanshu28 | OpenFOAM Running, Solving & CFD | 1 | July 11, 2013 09:19 |
New OpenFOAM Forum Structure | jola | OpenFOAM | 2 | October 19, 2011 06:55 |