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[Jan Stránský <question680941@xxxxxxxxxxxxxxxxxxxxx>]

Question #680941 on Yade changed:
https://answers.launchpad.net/yade/+question/680941

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello,

quick answers:
use higher stiffness for the case where "the particle get through the boundary"

> i want to know is there any difference between these two law?

yes

================
long answers:

1)
please read and follow [1], a MWE would really help here..
Also please be consistent in the title and actual problem. Title describes IGeom, question Law2..

> By the way, i have set correct relation between igeom, iphys and law

see above. Someone who wants to help you might want to a) check it and
b) know exactly what you have used

2)
difference between ScGeom [2] and PolyhedraGeom [3]
The main difference is the geometry described. ScGeom uses penetrationDepth [m], PolyhedraGeom uses penetrationVolume [m^3]

3)
difference between Law2_PolyhedraGeom_PolyhedraPhys_Volumetric and Law2_ScGeom_FrictPhys_CundallStrack
- normal force is evaluated similarly, stiffness * penetrationSomething. The main difference is penetrationSomething (depth or volume) and therefore also different physical dimension of contact stiffness.
- shear force and friction is also treated similarly, but differs in details.

cheers
Jan

[1] https://yade-dem.org/wiki/Howtoask
[2] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.ScGeom
[3] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.PolyhedraGeom

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