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[Jiannan Wang <question692076@xxxxxxxxxxxxxxxxxxxxx>]

Question #692076 on Yade changed:
https://answers.launchpad.net/yade/+question/692076

    Status: Answered => Open

Jiannan Wang is still having a problem:
Hello Robert,

Thank you for the help. I decrease the time step down to 1e-12, and it
is finally working. If I use dt = 1e-12 for few iterations, i.e. 500
iterations, and then switch back to 1e-9, seems also OK.

But all this only work on the exact pack file in the example (sphere file in [1]). I try to create my own pack, with roughly the same dimension and parasitical radius, still cannot get it works (even with dt = 1e-30 ...). Is there something I missed on the packing side? I attach a MEW packing script:
############
from yade import export

young=1e9
tt=TriaxialTest(StabilityCriterion=.001, compactionFrictionDeg=radians(3),internalCompaction=True, radiusMean=-0.004,numberOfGrains=1000, upperCorner=(0.05,0.05,0.05),lowerCorner=(0,0,0),thickness=0.01,radiusStdDev=0.3,sigmaIsoCompaction=-10000,maxMultiplier=1.+2e4/young,finalMaxMultiplier=1.+2e3/young)

O.run(20000,1)
export.text('CubicPack.spheres')
############3

Best regards
Jiannan Wang

[1]: https://gitlab.com/yade-
dev/trunk/-/blob/master/examples/ThermalEngine/5cmEdge_1mm.spheres

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