DEM-Particle Radius-Damping Coeff

samsam
edited January 31 in DualSPHysics v4.2
In the DEM simulation, the normal stiffness depends on the particle radius. My question is how can I check the size of the particles in my domain?

My second question is the equation for the damping coefficient stated in the user guide is different from the one used in Canelas et al., 2016. Which one was actually implemented in the code?

Thanks.

Comments

  • Hey Sam,

    The particle radius is simply your Dp/2. The DEM model is solved between the individual particles that make up a rigid body, and those are the size of the SPH particles.

    About the damping coefficient, the one in the user guide is the one in effect, hence the need for the restitution coefficient in the materials file. This would actually be the top most important parameter to change for the DEM simulations.

    Cheers
  • Dr. Canelas,

    Thank you very much for your reply. Any plan to add failure criteria (e.g. bending failure) in your DEM models in the near future?

    Regards.
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