yade-dev team mailing list archive

[Christian Jakob <jakob@xxxxxxxxxxxxxxxxxxx>]

Zitat von Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>:

> As I see it, calm will not help a lot because it is the size of the
> periodic box itself that is bouncing too much, while calm will only calm
> down particles. In your commited version at least, the problem is still
> there.
> The real problem is the huge overlap between clumps after random generation.
>
> I fixed it by setting a max number of particles and a smaller size of
> clumps (last commit). Isn't there a better way than trial and error to
> get the appropriate clump size? Did you ever generate a non-overlaping
> clump cloud?

Yes, but ppreparation steps are needed for that. Please have a look at  
examples/clumps/replaceByClumps-example.py and set if condition at the  
end true (preparation to reduce overlaps). When it is finished, you  
get your specified packing without overlaps (Press play button).
For your tutorial script you may need a another script, that just  
creates the packing. But this would be a bit "too much" for beginners,  
right?

> I was in fact surprised that makeClumpCloud doesn't complain on
> overlaps. If it was following the model of makeCloud, it would not give
> any overlap, but apparently it is not checked in the clump version (or a
> bug in the periodic case?).
>
>
> Bruno
>
>
> On 08/03/13 08:19, Christian Jakob wrote:
> > bruno, can you please check, if it is working as expected. i am really
> > not familiar with triaxial tests, so i dont know if calm() influences
> > your engine.
> >
> >
> > Zitat von Christian Jakob <jakob@xxxxxxxxxxxxxxxxxxx>:
> >
> > >   Branch: refs/heads/master
> > >   Home:   https://github.com/yade/trunk
> > >   Commit: 585ff580c521455d6ec79cfb8a33df179418a2bb
> > >
> > > https://github.com/yade/trunk/commit/585ff580c521455d6ec79cfb8a33df179418a2bb
> > >   Author: Christian Jakob <jakob@xxxxxxxxxxxxxxxxxxx>
> > >   Date:   2013-03-07 (Thu, 07 Mar 2013)
> > >
> > >   Changed paths:
> > >     M doc/sphinx/tutorial/06-periodic-triaxial-test.py
> > >
> > >   Log Message:
> > >   -----------
> > >   fix clumps behavior in 06-periodic-triaxial-test.py
> >
> >
> >
> >
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>
> --
> _______________
> Bruno Chareyre
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> ENSE³ - Grenoble INP
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