|February 20, 2014, 19:31||
Hardware suggestion for running 40M cells
Join Date: Mar 2012
Posts: 6Rep Power: 5
I have been running CFD simulation for more than 1.5 years but it had always been small cases of about 5M cells and I was running either on desktop or laptop. Currently, I am in need to perform simulation of a problem of about 40M elements, RANS calculation and to be able to finish in 1 or 2 days. Could you please suggest me the details for building the workstation? such as, what is kind of RAM amount and number of parallel cores I would be needing to perform simulations within such time limit?
Since, I am very new to this size problems I am unaware of the requirements and your suggestions will be really helpful.
|March 5, 2014, 18:44||
Join Date: Jul 2009
Posts: 16Rep Power: 8
Nobody can tell you how many cores you will need to finish a calculation in 2 days. It is impossible to know from the information you provide since it will depend steady/unsteady, number of iterations/time-steps required for convergence, transport equations, quality of mesh (poor quality will need more iterations on the pressure), etc. etc.
I can however tell you that 40M cells will, for most codes, scale to ~400 cores which is a cluster, not a workstation. And that will be with infiniband interconnect. If you really plan on running 40M on a workstation I think you will, for practical reasons, be limited to steady RANS at a push.
|April 15, 2014, 10:42||
Join Date: Mar 2014
Location: UK, Reading
Posts: 95Rep Power: 4
from what I have read here
(cores*50E3)< cells < (Memory/1E3)
A CHEERING BAND OF FRIENDLY ELVES CARRY THE CONQUERING ADVENTURER OFF INTO THE SUNSET
|hardware, hpc, parallel computing, rans, workstation|
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