Hardware suggestion for running 40M cells
Hello everyone,
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. |
Quote:
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. |
from what I have read here
(cores*50E3)< cells < (Memory/1E3) |
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