Learning Forum

[Pedro Quintanilla]

In my job, we have several licences and I wanted to know if there is a possibility to run two simulations on the same workstation if it has two CPUs installed. The simulations would work with the maximum cores of each of them separately.

I take this opportunity to ask experts if for general 3D Fluent simulations, you consider better performance using 1 or 2 CPUs with equivalent conditions.

 

Thank you very much for your help. I am trying to choose the best possible configuration and I don't have experience with many different hardware to have a conviction about it.

 

Regards

[Rob]

If you have licences you can run multiple Fluent jobs on a single machine. CPU is one aspect, then you've got RAM. However, the cpu interconnect is also important as you need to be able to pass data quickly between the cores on a single chip and between chips/boxes on a larger system. 

"Best" is very dependent on exactly what you're wanting to do, how big a model you have and how many licences you can use. 

[Pedro Quintanilla]

 

Thank you very much for your help Rob. I want to get a workbench for different type of analysis so, I asked in a general way because I know this problem dependence but I have not an accurate answer in my case. I understand it is not a simple answer because a lot of factors are involved but maybe your experience can offer a better vision than mine for this general proposal.

We have a few licences but I only asked for 2 simultaneous simulation no more. I think RAM is an important factor but my question was directed to processor because I read something about the relationship with the licence but maybe I was wrong.

If I try to limit the type of problem, I think it will work on heat transfer focused problems with slow flows in 3D analyses with the order of magnitude of a few millions of elements. 

 

Thank you Rob. It is really nice to see your helping comments again!

 

[Rob]

You're welcome, have a look here  https://www.ansys.com/it-solutions/platform-support  too. 

Your solver licence gives you (I think) four cores total (parallel) and you can then use packs/workgroups to increase parallel cpu usage.  My laptop has 10 solver seats (Fluent) and an unknown number of parallel packs/workgroup tokens. With 6(?) cores I can run all 10+parallel solver task. It's a really bad idea as the cpu is overloaded but can be done. 

Hence working out what you want to do, and then going from there. 

[Pedro Quintanilla]

I get the idea. Thank you!!

I will look the platform support in a detailed way to understand it deeply but reading you has been grate!

Thanks a lot