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

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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

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