Does The Tavares UFRJ Breakage Model have special settings requirements for CUDA solvers?

Jiashen Chen
Jiashen Chen Altair Community Member
edited October 18 in Community Q&A

Dear All,

I am trying to use EDEM's Tavares UFRJ Breakage Model to simulate the fracturing behaviour of particles (3-6 microns in diameter) under compression (subjected to pressures of about 30-300 MPa). When I try to use the GPU for CUDA solving, the particles fail to break up no matter how much I adjust the simulation step size and stress loading rate. However, when I try to switch to the CPU solver with the same parameter settings, the particles can experience the breakup behaviour as expected.

I am very confused about this, and I am wondering if I need to make some special configurations for the CUDA solver when using the Breakage Model. Where should I consider adjusting my model to troubleshoot the problem?

Some model-related configuration:
contact model: EEPA
contact radius: 1.5x
time step: 3e-11s
computing platform: NVIDIA RTX-4070

Thanks,
Jiashen Chen

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Best Answer

  • Stephen Cole
    Stephen Cole
    Altair Employee
    edited October 18 Answer ✓

    Hi Jiashen ,


    Just in addition to Jerrins comment are you using Windows or Linux?  There was an issue with EDEM 2024.0 on Linux where the particles were not breaking on GPU.  This is resolved in EDEM 2024.1 which was released last week.

    Regards

    Stephen

Answers

  • jerrinjobs
    jerrinjobs
    Altair Employee
    edited October 18

    Hi Jiashen

    In the Simulator, within the 'Simulator Engine' settings, click on 'Advanced Settings', and make sure your solver precision is set to 'Double'. CPU always runs on double precision, so maybe this is because of a precision issue. This would be worth a try.

    Hope this helps.

    Thanks,
    Jerrin Job

  • Stephen Cole
    Stephen Cole
    Altair Employee
    edited October 18 Answer ✓

    Hi Jiashen ,


    Just in addition to Jerrins comment are you using Windows or Linux?  There was an issue with EDEM 2024.0 on Linux where the particles were not breaking on GPU.  This is resolved in EDEM 2024.1 which was released last week.

    Regards

    Stephen

  • Jiashen Chen
    Jiashen Chen Altair Community Member
    edited October 18
    Jerrin Job Sibychan said:

    Hi Jiashen

    In the Simulator, within the 'Simulator Engine' settings, click on 'Advanced Settings', and make sure your solver precision is set to 'Double'. CPU always runs on double precision, so maybe this is because of a precision issue. This would be worth a try.

    Hope this helps.

    Thanks,
    Jerrin Job

    Hi Jerrin,

    Thank you for your reply.

    I checked my settings, and it is currently working as Double Precision. So I think the problem may not be here.

    Thanks,
    jiashen Chen

  • Jiashen Chen
    Jiashen Chen Altair Community Member
    edited October 18
    Stephen Cole_21117 said:

    Hi Jiashen ,


    Just in addition to Jerrins comment are you using Windows or Linux?  There was an issue with EDEM 2024.0 on Linux where the particles were not breaking on GPU.  This is resolved in EDEM 2024.1 which was released last week.

    Regards

    Stephen

    Hi Stephen,

    Thank you for your reply.

    I am running EDEM2024 with Windows. Is it possible that an EDEM upgrade version for Windows could solve this problem?

    Thanks,
    jiashen Chen

  • Jiashen Chen
    Jiashen Chen Altair Community Member
    edited October 18

    Hi Stephen,

    Thank you for your help.

    This problem was resolved when I updated to version 2024.1. Therefore, it has now been confirmed that the particles in EDEM2024 on Windows cannot be broken on GPU either.

    Hope this helps more people.

    Thanks,
    jiashen Chen

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