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[Jan Stránský <question706214@xxxxxxxxxxxxxxxxxxxxx>]

Question #706214 on Yade changed:
https://answers.launchpad.net/yade/+question/706214

    Status: Open => Needs information

Jan Stránský requested more information:
Hello,

please be more specific about your problem, this is still too short and too vague.
Please at least describe what problem would you simulate, what is whole domain size, particle sizes, what real time you would like to simulate (miliseconds, weeks?), ...

> is there any cohesive visco elastic model in YADE?

some (!) cohesion and viscosity is in
Law2_ScGeom6D_CohFrictPhys_CohesionMoment [1].

> can i use it with polyhedral grains?

You can use "polyhedral grains" for this "ScGeom" law2, if their resulting geometry is of ScGeom type.
So you can use potential particles and Ig2_PP_PP_ScGeom or potential blocks and Ig2_PB_PB_ScGeom.


Before continuing, you really should ask (and answer :-) the following
questions:

- why do you need DEM?
    - wouldn't another method (FEM) be more suitable?

- wouldn't explicit time integration in Yade with "very short" time step be problematic for your simulation?
    - w.g. if you simulate experiment that takes several days, I think explicit time integration would not be feasible..

- why do you need actual polyhedral grains?
    - would they interact with each other?
    - would spheres as the model simplification be sufficient?

Cheers
Jan

[1] https://yade-
dem.org/doc/yade.wrapper.html#yade.wrapper.Law2_ScGeom6D_CohFrictPhys_CohesionMoment

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