Yade

What is difference between: L3Geom; L6Geom and ScGeom

Asked by Tran Minh Khoa

Dear All,

I am a newbie in Yade. Please give me more detail about the difference between L3Geom; L6Geom and ScGeom .
Please give me some examples and reasons that in which case, Ig2_Sphere_Sphere_L3Geom or Ig2_Sphere_Sphere_ScGeom or Ig2_Sphere_Sphere_ScGeom6D. It seems that the Ig2_Sphere_Sphere_ScGeom6D should be use because at a contact, there is 6 DOF.

The second question is regarding the clump. I made a clump by combining 2 sphere particles for example location and radius of particle is ((0,0,0),1) and (0.5, 0,0),1) and I thought that somehow, clumps may reduce the effect of free rotation, but it seemed to rotate as sphere particles, specially in X axis.

Please try to answer as soon as possible.
Thank you very much

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Jan Stránský (honzik) said : 		#1

Hello,

> I am a newbie in Yade.

welcome :-)

> Please give me more detail about the difference between L3Geom; L6Geom and
> ScGeom .
> Please give me some examples and reasons that in which case,
> Ig2_Sphere_Sphere_L3Geom or Ig2_Sphere_Sphere_ScGeom or
> Ig2_Sphere_Sphere_ScGeom6D. It seems that the Ig2_Sphere_Sphere_ScGeom6D
> should be use because at a contact, there is 6 DOF.
>

L3Geom and L6Geom are now not maintained and should not be used. ScGeom is
Yade standard.

ScGeom has 3 DOFs (normal + 2 shear components), ScGeom6D has 6 DOFs
(ScGeom + moments)

>
> The second question is regarding the clump. I made a clump by combining 2
> sphere particles for example location and radius of particle is
> ((0,0,0),1) and (0.5, 0,0),1) and I thought that somehow, clumps may reduce
> the effect of free rotation, but it seemed to rotate as sphere particles,
> specially in X axis.
>

clump is a rigid connection of several particles. Otherwise clump acts as
any other particle. Here I am not sure about the meaning of "may reduce the
effect of free rotation". Next time please be more specific and also put a
MWE [1] to your message. Also please open a new question for this topic as
it differs a lot from the question title and basically is a different
question :-) see [1], too.

cheers
Jan

[1] https://yade-dem.org/wiki/Howtoask

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Tran Minh Khoa (khoatranxd) said : 		#2

Dear Jan,

Thank for your answer and suggestion.

Can you help with this problem?

Provide an answer of your own, or ask Tran Minh Khoa for more information if necessary.

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