Why build the SPH layer at the bottom?

Could someone tell me why they build a SPH layer at the bottom?

This is an example of dam break from https://www.dynaexamples.com/sph/intermediate-examples/wavestructure

Best Answers

  • MTLCYMTLCY ???Member
    Accepted Answer

    Thank you so much for your kind suggestions. My issues have been addressed.😀

Answers

  • MTLCYMTLCY ???Member
    edited October 29

    Thank you very much for yor response. Another detail is that the bottom of the pillar is lower than the bottom rigid wall. Is it necessary?


    I modified this model by changing the shape of obstacle and size of the whole model, however, some unreasonable results occurs. Particles penetrated the obstacle and no interaction occurs(CONTACT_AUTOMATIC_NODES_TO_SURFACE is used to define the interaction between particles and FEM obstacle). Furthermore, particles moves upwards along the left wall. Could you tell me how to handle the penetration?


  • MTLCYMTLCY ???Member
    Accepted Answer

    Thank you so much for your kind suggestions. My issues have been addressed.😀

  • MinerMiner Member

    Hi all, I have a new issue in this simulation. After the water droped down, there are some particles move upwards along the left rigidwall. It is like those particles adhere to the wall. I have tried to reduce the gap between wall and water, but doesn't work. Could you help me to resolve this?


  • The rigidwall must align the part surface. When change the particle spacing, small gap may generated between the rigidwall and part surface, thus the contact between rigidwall and part produced weird results. If particle spacing is changed, the rigidwall must be updated.

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