yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

Hi Chiara,

1/ The number of steps is not predictable anyway, since the criterion to 
stop is static equilibrium.
2/ StdDev is not modified by expansion, the PSD is kept unchanged in the 
process.
3/ I NEVER set radiusMean, which is just a result of the compaction (as 
final volume would be a result too with external compaction).
4/ At the end, internal friction and elastic modulii are defined in such 
a way that they are independant on radiusMean (it explains why I don't 
bother setting the final mean size - the PSD is more important, but it 
is unchanged).

Bruno




chiara.modenese@xxxxxxxxx a écrit :
> Hi all,
>
> question on the expansion method used to generate the sample.
>
> Well, 
> actually I see that radius multiplier is calculated at each time step according 
> to the actual meanStress on the walls (except in the case in which sigmaiso <= 
> meanStress where it is fixed at the finalMaxMultiplier value).
> If the value at 
> each time step changes in this way, I cannot predict the total number of steps 
> that are needed to get the sample and so the initial value of meanRadius (or 
> Volume) and StDev that it is used during the random generation of particles. 
> So, when you use this method, which radiusMean do you actually choose according 
> to a specific (final) particle size distribution? 
>
> Thanks a lot,
> Cheers, Chiara
>
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