How to set boundary condition on certain material particle, to make them only have degree of freedom on one direction?

Qin He
Qin He Altair Community Member
edited October 27 in Community Q&A

How to set boundary condition on certain material particle, to make them only have degree of freedom on one direction?

I found in API that velocity of particle are in magnitude, without direction. 

Or is it possible to define new parameters for particle class without changing system header file?

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Answers

  • Stephen Cole
    Stephen Cole
    Altair Employee

    Hi Qin,

    In the EDEM API you can only return the Force and Torque on a particle. Typically this is in format

    results.force = value; where this is a vector. However you can also write it as:

    results.force.x = value; where this is just the X component of the vector (double). There is more information in the YouTube series:

    https://youtu.be/TAbvgzrGP8Y?feature=shared

    If you don't return a force, or return 0's for specific components this will be passed to the particle, so always returning 0 for the x component of the force will only allow it to move in the Y or Z axis.

    Slightly different but you could also consider the Rigid Link condition:

    https://help.altair.com/edem/topics/creator_tree_geometries/rigid_link_condition_t.htm?

    Regards

    Stephen

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