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[Christian Jakob <question230139@xxxxxxxxxxxxxxxxxxxxx>]

Question #230139 on Yade changed:
https://answers.launchpad.net/yade/+question/230139

    Status: Open => Answered

Christian Jakob proposed the following answer:
> Now I still have no idea about what you just said some small
modifications because there is nothing

sorry, my fault, everthing looks fine.

your problem comes from density = 0.0 for your spheres. somewhere in the
code inertia is devided by density, so you get nans for inertia of
clumps ...

please define a material like:

id_Mat=O.materials.append(FrictMat(young=1e7,poisson=0.3,density=1000,frictionAngle=1))
Mat=O.materials[id_Mat]

and set it to your spheres:

        spherepara1 = sphere ( coors1 , radius , material=Mat )
        spherepara2 = sphere ( coors2 , radius , material=Mat )
        spherepara3 = sphere ( coors3 , radius , material=Mat )
        spherepara4 = sphere ( coors4 , radius , material=Mat )  

then everthing works fine ;)

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