Learning Forum

[UniversityofQLD]

Hi everyone,

I am running a 2-way FSI between Ansys Transient Structural and CFX on a workstation with 128 GB memory, 16 cores, 32 virtual processors and a NVIDIA RTX A5000 GPU. I am currently wondering how I should set up my solvers in Workbench for best solving time efficiency. This is probably partially problem-dependent but I was wondering if anyone had a rule of thumb for how many cores you would assign to Ansys Mechanical vs how many partitions you would assign to CFX etc. I am not limited by licenses.

Thank you for your advice!

[Steve]

Since you have 16 physical cores, this is the largest number of CFX partitions that can be run. CFX and Mechanical don't solve at the same time so you could use 16 partitions for CFX and 16 cores for Mechanical. You'll have to ensure that you'll have enough memory to have both the CFX and Mechanical cases loaded at the same time, but 128GB is a good amount of memory and should suffice for most cases. Please see the following for recommendations on the lowest number of CFX mesh nodes per partition https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/cfx_mod/i1328402.html?q=30%2C000.
Steve

[UniversityofQLD]

Thank you Steve! I did not know that CFX and Mechanical don't solve at the same time so that is very helpful to know!