Particle Explosions

Jake Kim_21578
Jake Kim_21578 Altair Community Member
in Community Q&A

I am running two simulations

The first simulation has a static friction of 0.8, surface energy of 0.35 mJ and a particle modulus of 2.1GPa. The image below is how it looks like when spread.

Screenshot 2024-12-29 175701.png

The Second simulation has a static friction of 0.8, surface energy of 5.6mJ and a particle modulus of 2.1 GPa. The image below is how it looks when spread.

Screenshot 2024-12-29 175244.png

Why does the bottom image have these particle explosions?

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Answers

  • Stephen Cole
    Stephen Cole
    Altair Employee

    Hi Jake,


    This is likely related to the EDEM Simulation time-step used. I notice the time-step is relatively low but you have significantly increased the cohesive force included in the simulation, and higher forces typically require lower time-steps to be stable.


    Regards

    Stephen

  • Jake Kim_21578
    Jake Kim_21578 Altair Community Member

    By the cohesive forces you mean the surface energy correct?

  • Stephen Cole
    Stephen Cole
    Altair Employee

    Hi Jake, that's correct.

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