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May 19, 2020, 09:34 |
Number of Cores in ANSYS Mechanical
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#1 |
Member
Join Date: Oct 2017
Posts: 35
Rep Power: 9 |
Hi,
Can anyone tell me how to increase the number of cores used in ANSYS Mechanical? As I understood when the number of cores exceeds 4, an error appears and the solution stops. I want to use 8 cores in my analysis. What should I do? |
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May 20, 2020, 04:10 |
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#2 |
Senior Member
Stuart
Join Date: Jul 2009
Location: Portsmouth, England
Posts: 739
Rep Power: 26 |
If you are using an older version of Mechanical (2019 R1 and before) click on Tools / Solve Process Settings / Advanced and enter the amount of CPUs and GPUs you want to use.
If you are using a newer version of Mechanical (2019 R2 and after) which has the new GUI with the ribbon layout then cores are set in the Home tab. If you click on the lower right-hand corner of the Solve area it opens the Solve Process Settings box as in the older ANSYS versions. |
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May 20, 2020, 07:12 |
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#3 |
Member
Join Date: Oct 2017
Posts: 35
Rep Power: 9 |
Dear siw, thank you for your quick response. I am using ANSYS 2019 R1 and as I said when I increase the number of cores (more than 4 cores) I encounter an error and the solution stops. Any idea?
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May 20, 2020, 07:53 |
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#4 |
Senior Member
Stuart
Join Date: Jul 2009
Location: Portsmouth, England
Posts: 739
Rep Power: 26 |
Do you have the correct licences for running on more cores? Are you using a Student or Commercial licence? Post a screen print of the Mechanical error.
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May 20, 2020, 10:03 |
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#5 |
Member
Join Date: Oct 2017
Posts: 35
Rep Power: 9 |
I think I realized where the problem is… my PC has 4 cores and 8 logical processors. I thought that ANSYS Mechanical is as same as Fluent and CFX and I can set the number of cores equal to the logical processors but probably it’s not true… am I right?
I am using Student license. And you said about the correct licenses… I didn’t understand what you mean. |
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May 21, 2020, 02:32 |
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#6 |
Senior Member
Stuart
Join Date: Jul 2009
Location: Portsmouth, England
Posts: 739
Rep Power: 26 |
The ANSYS Student website (https://www.ansys.com/en-gb/academic...udent-products) System Requirements and Browser drop down menu says "Support for up to 2 cores for HPC solutions". So that was why I asked what you were using. I only use the Student version to try features on my personal laptop (so I do not need run a job on more than 2 cores). It is only when I use ANSYS at work on our commercial licences I can use many cores as we have some HPC Packs.
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February 22, 2024, 11:03 |
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#7 | |
New Member
Join Date: Feb 2024
Location: EU
Posts: 3
Rep Power: 2 |
Quote:
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March 6, 2024, 10:37 |
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#8 |
New Member
Join Date: Mar 2024
Posts: 3
Rep Power: 2 |
I've encountered issues with exceeding the allowed number of cores, so the information here is particularly useful to me. Understanding the difference between physical cores and logical processors, as well as potential license restrictions, is crucial to ensure proper configuration and avoid mistakes.
https://spacemanoyunu.net/ Last edited by Farkin; March 7, 2024 at 04:27. |
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April 4, 2024, 12:05 |
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#9 |
Senior Member
Erik
Join Date: Feb 2011
Location: Earth (Land portion)
Posts: 1,184
Rep Power: 23 |
You Stated: "my PC has 4 cores and 8 logical processors"
So you should only solve on those physical cores, not logical cores, which can introduce problems and often times slow performance. It would probably be best to go into the BIOS and disable hyperthreading (or "SMT" for AMD CPUS) so that the machine only ever uses 4 physical cores without hyperthreading. |
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August 21, 2024, 18:40 |
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#10 |
New Member
Bruno B W
Join Date: Aug 2023
Posts: 6
Rep Power: 3 |
My mesh has 3 elements, i'm following the Cornell free course, and was receiving the warning about number of elements been less than max number of cores requested. Solved reducing the cores to 2.
Still managing to achieve the correct answer :? |
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