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Re: [Question #695989]: Packing with two PSD

 

Question #695989 on Yade changed:
https://answers.launchpad.net/yade/+question/695989

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello,

> young = 1e20 for Mat 3
> Mat3=O.materials.append(FrictMat(young = 1e14, poisson = 0.1))

please be consistent.

> sp1=pack.SpherePack()
> sp2=pack.SpherePack()

use ONE SpherePack, calling makeCloud 2x.
The current way, the two sphere packs are independent, knowing nothing about each other, so the resulting bodies may be (most likely are) overlapping, which may cause some small particles "firing" from large particles, giving them high velocity, higher than needed to detect sphere-facet interaction.
Using one sphere pack, particles are guaranteed to be non-overlapping.

Also, using >0 thick boundary, e.g. box instead of facet, should help.

cheers
Jan

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