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Re: [Question #699705]: Empirical value of rolling stiffness (Krot)

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Zhicheng Gao <question699705@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 02 Dec 2021 11:01:06 -0000
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Question #699705 on Yade changed:
https://answers.launchpad.net/yade/+question/699705

Zhicheng Gao posted a new comment:
Another problem is how to distinguish between ball-to-ball contact and
ball-to-wall contact, the material of balls and walls are all both
FrictMat. And, for the Hertz-Mindlin contact law, only the
Ip2_FrictMat_FrictMat_MindlinPhys of IPhysFunctor and
Law2_ScGeom_MindlinPhys_Mindlin of LawFunctor can be used, ie

        InteractionLoop(
            [Ig2_Sphere_Sphere_ScGeom(),Ig2_Box_Sphere_ScGeom6D()],
            [Ip2_FrictMat_FrictMat_MindlinPhys(en=en,eta=eta,krot=krot),Ip2_FrictMat_FrictMat_MindlinPhys(en=en)],
            [Law2_ScGeom_MindlinPhys_Mindlin()],

So how to distinguish between ball-ball contact and ball-wall contact,
so that the contact between the wall and the ball is set to be
frictionless and anti-rotational.

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