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2D and 3D HLBM object contact stiffness

OpenLB – Open Source Lattice Boltzmann Code Forums on OpenLB General Topics 2D and 3D HLBM object contact stiffness

Viewing 5 posts - 1 through 5 (of 5 total)
  • Author
    Posts
  • #4677
    guojuw
    Participant

    Dear OLB developers,

    How can I change the particle to particle contact stiffness for HLBM objects in 2D and 3D?

    Regards,
    Junwei Guo

    #4679
    mathias
    Keymaster

    There is no stiffness, in the limit it is a hard-sphere collision. But you may add a collision model. Best Mathias

    #4680
    guojuw
    Participant

    Dear Mathias,

    I mean the parameter gamma in equation(9). How to modify this particle collision parameter?

    Regards,
    Junwei Guo

    Article (Krause2017)
    Krause, M. J.; Klemens, F.; Henn, T.; Trunk, R. & Nirschl, H.
    Particle flow simulations with homogenised lattice Boltzmann methods
    Particuology, Elsevier, 2017 , 34 , 1-13

    #4681
    mathias
    Keymaster

    For it, you need to change the source code to add an additional force according to the paper in ParticleDynamics2D. In the examples we did not add a particle-particle force.

    #4683
    guojuw
    Participant

    Dear Dr. Mathias,

    I think the current hard sphere collision model will result in spheres overlapping if the suspension is not dilute or multiple contacts occur. Would you mind to share your code used for elastic collision (the implementation of parameter gamma) showing in your paper?

    Thanks,
    Junwei Guo

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