How to determine the interaction parameters between different bulk materials?

Gary_Ko_460
Gary_Ko_460
Altair Employee
edited October 9 in Community Q&A

Hi Support,

 

Assuming that I have two bulk materials A and B, and I would like to calibrate the interparticle interactions, including A-A, A-B and B-B. Take the static angle of repose test as an example, could I calibrate A-B interactions by performing the test with mixture of A and B (on the premise that the A-A and B-B interaction parameters have been calibrated)?

 

Regards,

Gary

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Answers

  • Stephen Cole
    Stephen Cole
    Altair Employee
    edited September 30

    Hi Gary,


    It partly depends on the case.  If A and B are fully mixed in the application you want to simulate I would make the assumption that all the interactions can be considered the same and you can have one set of parameters which represents the bulk material behaviour.  This assumption only works if the material is mixed, and that there are not large discrepancies in material type A and B.

    However if you have a process where A and B are separate I would calibrate A-A in one test and B-B in a separate test.  It is common then to make an assumption that A-B interactions are a half-way point between A-A and A-B but equally if you have the experimental data for the mix you could also verify this.

  • Gary_Ko_460
    Gary_Ko_460
    Altair Employee
    edited October 9
    Stephen Cole_21117 said:

    Hi Gary,


    It partly depends on the case.  If A and B are fully mixed in the application you want to simulate I would make the assumption that all the interactions can be considered the same and you can have one set of parameters which represents the bulk material behaviour.  This assumption only works if the material is mixed, and that there are not large discrepancies in material type A and B.

    However if you have a process where A and B are separate I would calibrate A-A in one test and B-B in a separate test.  It is common then to make an assumption that A-B interactions are a half-way point between A-A and A-B but equally if you have the experimental data for the mix you could also verify this.

    Hi Stephen,

     

    Thanks for the information you provide. Regarding the second part, is there any theoretical basis for this? Or is it based on experience?

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