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[Jan Stránský <question269513@xxxxxxxxxxxxxxxxxxxxx>]

Question #269513 on Yade changed:
https://answers.launchpad.net/yade/+question/269513

Jan Stránský proposed the following answer:
Hi José,

sorry for my last confusing message.. The problem is that you do not have
consistent IGeom and IPhys types. Do you have any special reason, why the
facetBox has FrictMat? Could you use PolyhedraMat instead? you would then
have:

   InteractionLoop(
      [Ig2_Facet_Polyhedra_PolyhedraGeom()], # [1]
      [Ip2_PolyhedraMat_PolyhedraMat_PolyhedraPhys()], # [2]
      [Law2_PolyhedraGeom_PolyhedraPhys_Volumetric()], # [3]
   ),

cheers
Jan

[1]
https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Ig2_Facet_Polyhedra_PolyhedraGeom
[2]
https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Ip2_PolyhedraMat_PolyhedraMat_PolyhedraPhys
[3]
https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_PolyhedraGeom_PolyhedraPhys_Volumetric


2015-07-22 0:56 GMT+02:00 Jan Stránský <question269513@xxxxxxxxxxxxxxxxxxxxx
>:

> Question #269513 on Yade changed:
> https://answers.launchpad.net/yade/+question/269513
>
> Jan Stránský proposed the following answer:
> Hi José,
>
> O.engines=[
> > ...
>
>    InteractionLoop(
> >       [Ig2_Facet_Polyhedra_PolyhedraGeom()],
> >       [Ip2_FrictMat_PolyhedraMat_FrictPhys()],
> >       [Law2_ScGeom_FrictPhys_CundallStrack()],
> >    ),
> >    ...
> > ]
>
>
> The problem (as the error says) is here:
> Ig2_Facet_Polyhrda_PolyhedraGeom -> PolyhedraGeom instance
> Ip2_FrictMAt_PolyhedraMat_FrictPhys -> FrictPhyd
> Law2_ScGeom_FrictPhys_CundallStrack -> combines ScGeom and FrictPhys, but
> you have PolyhedraGeom and FrictPhys from previous pieces of code..
>
> try Law2_ScGeom_FrictPhys_CundallStrack [1] instead
>
> cheers
> Jan
>
> [1]
>
> https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom_FrictPhys_CundallStrack
>
>
> 2015-07-21 22:36 GMT+02:00 Jérôme Duriez <
> question269513@xxxxxxxxxxxxxxxxxxxxx>:
>
> > Question #269513 on Yade changed:
> > https://answers.launchpad.net/yade/+question/269513
> >
> >     Status: Open => Answered
> >
> > Jérôme Duriez proposed the following answer:
> > Hello,
> >
> > The "IGeom" of the appearing Polyhedra - Facet(Box) interaction is of
> > PolyhedraGeom type (see Ig2_Facet_Polyhedra_PolyhedraGeom() in your
> > script)
> >
> > However, for what concerns the "IPhys" of this interaction, execution of
> > Ip2_FrictMat_PolyhedraMat_FrictPhys 's job triggers some execution of
> > Ip2_FrictMat_FrictMat_FrictPhys [1].
> >
> > This Ip2_FrictMat_FrictMat_FrictPhys::go is designed for interaction
> > with "IGeom" of "GenericSpheresContact" (or derived) types [2]. And the
> > PolyhedraGeom type is not one of those [3]
> >
> >
> > To be short: Yade is currently not designed to deal with the interaction
> > you want.... Discussing code improvements or workarounds will require the
> > answer of other users familiar with this code...
> >
> > Jerome
> >
> > [1] https://github.com/yade/trunk/blob/master/pkg/dem/Polyhedra.cpp#L414
> > [2] https://github.com/yade/trunk/blob/master/pkg/dem/FrictPhys.cpp#L17
> > [3] https://yade-dem.org/doc/yade.wrapper.html#igeom
> >
> >
> > PS: thank you for complying the in the air "MWE" question fashion !
> >
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