Question #452513 on Yade changed:
https://answers.launchpad.net/yade/+question/452513
Status: Open => Answered
Jan Stránský proposed the following answer:
Hi Michael,
I'm new with Yade
Welcome :-)
the basic idea of DEM is that inter-particle forces depends on mutual
overlap (linearly in the most basic case). So if you apply gravity and the
sample is supposed to be in static equilibrium, overlaps are intrinsic part
of the situation.
One solution is to enlarge particles slightly before simulation and shrink
them back to original size afterwards. In this case there will be no
overlaps, but the particles would not be touching at the same time (both
mutually and also between particle-wall).
To make particles just touching the walls, you can shrink the particles
individually to fulfill exactly the condition of touching.
cheers
Jan
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