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[Chareyre <question204014@xxxxxxxxxxxxxxxxxxxxx>]

Question #204014 on Yade changed:
https://answers.launchpad.net/yade/+question/204014

Chareyre posted a new comment:
A general rule in explicit DEM:
- If dt is too large, the scheme is unstable. Simulation explodes in a
few steps, it is impossible to not notice the problem.
- If the scheme is stable, then it is at the same time accurate (i.e. in
most cases you will not notice differences with smaller dt).

Exception: high velocity impacts, maybe your case if the rotational
speed of the facets is high. In this case, it can be stable BUT innacurate.
Depends on your rotational velocity, none of the timesteppers will help
to decide in this situation (well, they still give an upper bound for dt).

Bruno

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