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[Bruno Chareyre <question688771@xxxxxxxxxxxxxxxxxxxxx>]

Question #688771 on Yade changed:
https://answers.launchpad.net/yade/+question/688771

Bruno Chareyre posted a new comment:
Hi,
I checked you script.
The problem is that the automatic verletDist is based on minimum particle size.
As it turns out that it doesn't lead to a  wise decision in your highly heterogeneous case (the extra length is much too small), and consequently the collision detection occurs much too often.
You need to increase verletDist to decrease collision frequency to ~1/100 iterations or less. [1]

In addition, with 140k spheres in periodic conditions the initial sort
(iteration 1) is slow. It could be improved probably, but that cost
remain small compared to an entire simulation (it suggests that 1
iteration should be done before enabling timing, though, in order to get
consistent measurements).

I hope it helps.

Bruno

[1] https://yade-
dem.org/doc/yade.wrapper.html?highlight=verletdist#yade.wrapper.GeneralIntegratorInsertionSortCollider.verletDist

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