Contact motion between particles

Asked by 内山康太郎

I am studying about DEM using "periodic-simple-shear.py"[1] as an example.
So, I have two questions.

1. Where (how many lines) in periodic-simple-shear.py is the motion between particles solved?

2, How is the contact motion between particles solved?  Please let me know if you have any reference documents.

[1]https://gitlab.com/yade-dev/trunk/blob/master/doc/sphinx/tutorial/04-periodic-simple-shear.py

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Jan Stránský (honzik) said :
#1

Hello,

> So, I have two questions.

please read [1], point 5 ("Do not merge different questions in one single post").
Here it seems as one problem, just have it in mind.

Depending on specific definitions of "the motion between particles", "being solved", "contact motion between particles" etc., it may be:
- applying O.cell.velGrad
- something in O.engines:
    - NewtonIntegrator updates positions of particles based on their current state (position, velocity, mass) and applied force
    - InsertionSortCollider identifies the (also potential) contacts
    - InteractionLoop solves the "contact physics" (in broad sense)
    - ...
- ...

as a reference documents, for start have a look at Introduction [2], Formulation [3] and User's manual [4].

If you give more information, we can provide more focused sections and/or other sources.

Cheers
Jan

[1] https://www.yade-dem.org/wiki/Howtoask
[2] https://yade-dem.org/doc/introduction.html
[3] https://yade-dem.org/doc/formulation.html
[4] https://yade-dem.org/doc/user.html

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