How the particle velocity is calculated?

Iwona Wyrebska_20857
Iwona Wyrebska_20857 Altair Community Member
edited May 2023 in Community Q&A

Hello everyone!  My project is to model planetary ball mill but first just to see how metallic powder is being mixed in the vial. I have few questions about particle velocity… How is it calculated? What is the frame of reference? And the most important question for me what is the maximum particle velocity? From the edem user guide I only know that it is the speed of the fastest particle in the model – but if I have milions of particles I suspect that more than one particle has a maximum speed – can I check it? Thank you!

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Answers

  • Stephen Cole
    Stephen Cole
    Altair Employee
    edited May 2023

    Hi Iwona,


    The velocity is calculated from the sum of the forces acting on the particle (contact forces, gravity etc.).  The acceleration over the time-step is then calculated from the force and particle mass.  This is always shown in the global reference frame.

    You can export the particle data from the Analyst>File > Export Results Data and choose query standard for particle velocity.  Standard gives you a value for each particle, although you may want to try and restrict this to a specific area using bin groups or similar.  The EDEM e-learning would help with some of the Analyst settings:

    https://community.altair.com/community?id=community_blog&sys_id=9ba0c9aa1b48d550c4dfdbd9dc4bcb27


    Regards

    Stephen

  • Iwona Wyrebska_20857
    Iwona Wyrebska_20857 Altair Community Member
    edited May 2023

    Dear Stephen, 

    thank you very much for your help.

     

    Regards

    Iwona

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