Question #663532 on Yade changed:
https://answers.launchpad.net/yade/+question/663532
Status: Open => Answered
Jérôme Duriez proposed the following answer:
Hi,
Flow.ids is never used by the code of FlowEngine (see source code at [*]
if you wish to check it) so, again, it is *not a problem* if it is
neither defined by the user, nor updated by YADE itself ;-)
As for vizualizing movements, seeing with naked-eye particle movements on YADE
GUI, or real-simulation time Paraview animations, is quite rare. (would you see
sand grain movements during a triaxial test in the lab ?)
As such, this is not a good indicator whether things go "well" or not.
Jérôme
[*]
https://github.com/yade/trunk/blob/4e5f181f54f3a5f94d1fbe0190f57de1d6833d46/pkg/pfv/FlowEngine.hpp.in
and
https://github.com/yade/trunk/blob/4e5f181f54f3a5f94d1fbe0190f57de1d6833d46/pkg/pfv/FlowEngine.hpp
and
https://github.com/yade/trunk/blob/4e5f181f54f3a5f94d1fbe0190f57de1d6833d46/pkg/pfv/FlowEngine.cpp
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