Question #669734 on Yade changed:
https://answers.launchpad.net/yade/+question/669734
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
> but I found that the force chain of polyhdra and walls were all
concentrated to the center of walls
you will get the same problem with facets.. also see [1].
With finer facets you improve this postprocessing problem, but increase number
of bodies (simulation time) and introduce unneeded negative effects of facets
(mainly wrong stiffness for a body in contact with multiple facets).
So this workaround works, but the clean way would be to use walls and update
the postprocessing :-)
> "ERROR /data/trunk/pkg/common/InsertionSortCollider.cpp:61
> insertionSortParallel: Parallel insertion sort needs verletDist>0"
> Though, it could keep running, but I want to know what's the problem of this
> error message?
It is an error from point of InsertionSortCollider (not the simulation itself).
It is trying to run in parallel, but cannot because verletDist is set to -.5 by
default [2], possibly automatically updated according to spheres in the
simulation.
I **think** the error means that the collider will not run in parallel.
Either ignore the message or set manually:
InsertionSortCollider(..., verletDist=.05), # or another positive value
cheers
Jan
[1] https://answers.launchpad.net/yade/+question/668264
[2]
https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.InsertionSortCollider.verletDist
[3]
https://github.com/yade/trunk/blob/master/pkg/common/InsertionSortCollider.cpp#L61
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