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Re: [Question #677941]: polyhedra collison simulation did not work

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Jan Stránský <question677941@xxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 20 Jan 2019 10:48:35 -0000
Reply-to: question677941@xxxxxxxxxxxxxxxxxxxxx
Sender: bounces@xxxxxxxxxxxxx

Question #677941 on Yade changed:
https://answers.launchpad.net/yade/+question/677941

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello,
always try to read the very first problem/warning/error. In your case, the output show

WARN  yade/pkg/dem/Shop_01.cpp:423 PWaveTimeStep: PWaveTimeStep has not
found any suitable spherical body to calculate dt. dt is set to 1.0

so the time step is set to a very large value, making the simulation
unstable.

The solution is to set suitable time step manually or using
GlobalStiffnessTimeStepper (not sure if it works with polyhedra).

Also instead of clicking "play", you can try "step", which proceed only
one time step. It may (or not :-) reveal the problem better.

cheers
Jan

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