yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>]

Good one, thanks.
The shape test is, I think, ok. The only problem is that it may in fact
accept something such as a wall-wall interaction, it would be better to
test geometryIndex1 == geometryIndex2 == sphereIndex.
Bruno

On 17 October 2016 at 18:46, Jérôme Duriez <jerome.duriez@xxxxxxxxxxx>
wrote:

> Hi,
>
> Just to give some figures about this bug:
> Random examples of triaxial simulations (with 20000 spherical particles
> and 6 boxes) show here ~ 45% of sphere-wall interactions that are useless
> at the end of the simulation. Ie ~ 3% of the (real) interactions total
> number.
>
> I think checking for penetrationDepth < 0 around l.95 of the code [1],
> before deciding to "continue", would make sense and solve this bug.
> OK ?
>
> Do we take the opportunity to replace the shape test [2] with something
> else ? (what ? if yes)
>
>
> Jerome
>
>
> [1] https://github.com/yade/trunk/blob/master/pkg/dem/Law2_
> ScGeom_CapillaryPhys_Capillarity.cpp#L95
> [2] https://github.com/yade/trunk/blob/master/pkg/dem/Law2_
> ScGeom_CapillaryPhys_Capillarity.cpp#L98
>
> --
> You received this bug notification because you are a member of Yade
> developers, which is subscribed to Yade.
> https://bugs.launchpad.net/bugs/1628273
>
> Title:
>   Sphere - nonSphere interactions never deleted by
>   Law2_ScGeom_CapillaryPhys_Capillarity
>
> Status in Yade:
>   New
>
> Bug description:
>   Hi,
>
>   Let say one performs simulation with
>   Law2_ScGeom_CapillaryPhys_Capillarity and
>   Law2_ScGeom_FrictPhys_CundallStrack.neverErase = 1 (in order to keep
>   menisci between separated particles)
>
>   In such case, interactions between sphere and non spherical particles
>   (e.g. boundaries) are not deleted by
>   Law2_ScGeom_FrictPhys_CundallStrack when geometrical contact is lost,
>   and are neither handled (deleted because of no meniscus, in
>   particular) by Law2_ScGeom_CapillaryPhys_Capillarity because
>   Law2_ScGeom_CapillaryPhys_Capillarity simply disregards such
>   interaction [*].
>
>   And the user ends up with much more interactions than necessary..
>
>   I'm filling a Bug report for the record and possible discussion about
>   desired behaviour (sorry I could not provide a MWE !)
>
>   Jerome
>
>   [*]
>   https://github.com/yade/trunk/blob/master/pkg/dem/Law2_
> ScGeom_CapillaryPhys_Capillarity.cpp#L98
>
> To manage notifications about this bug go to:
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>
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