Cohesion in DEM

RWD_PWR_BMW_5
RWD_PWR_BMW_5 Altair Community Member
edited April 10 in Community Q&A

Hello, 

I am simulating the spreadability of sand in additive manufacturing using EDEM. I was curious if the EDEM software considers particle cohesion. I understand that cohesiveness is negligible in dry sand, which is what I am focusing on. However, I have a lot of fine particles in the software; do they interact cohesively? To clarify, after the layer is spread on the substrate, it is necessary to identify the reasons for the formation of macro-voids and empty patches across the layer. Since the particles I am simulating are irregularly shaped, this can be due to inter-locking between particles or jamming during spreading. I would like to know if cohesion plays a role in this situation because the software does not know that I am simulating dry sand. Also, are there tools that help with studying this case? For example, can we take a cross-sectional view of the deposited layer to study it?

Thank you for your time and consideration 

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Answers

  • Stephen Cole
    Stephen Cole
    Altair Employee
    edited April 10

    Hi,

    Fine particles, especially with shape and size distribution, do show some cohesive behaviour however typically we would include a physics model that introduces cohesion.

    EDEM Physics Models e-learning

    The Edinburgh Elasto-Plastic adhesion model or the JKR models are the typical go-to models for this type of material.

    You can take a cross-sectional view and other analysis options, these are outlined at the end of the standard e-learning course:

    EDEM introduction e-learning

    Regards

    Stephen

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