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[Chiara Modenese <question175606@xxxxxxxxxxxxxxxxxxxxx>]

Question #175606 on Yade changed:
https://answers.launchpad.net/yade/+question/175606

Chiara Modenese proposed the following answer:
On 2 November 2011 13:18, Chiara Modenese <c.modenese@xxxxxxxxx> wrote:

>
>
> On 2 November 2011 12:50, Chareyre <question175606@xxxxxxxxxxxxxxxxxxxxx>wrote:
>
>> Question #175606 on Yade changed:
>> https://answers.launchpad.net/yade/+question/175606
>>
>> Chareyre posted a new comment:
>> Chiara,  I was guessing this function was orphan since nobody was
>> explaining its usage, but there is no reason to remove if it is used by
>> someone (you). It is your decision.
>>
>> There are still things unclear that could maybe be fixed:
>> - why mandatory name=""?
>>
> It should be removed (sorry).
>
>> - why must we give psd and meanRad at the same time? it is annoying
>> because defining the latest is non-trivial
>>
> Because we need an estimate of the initial volume of solids (the latter
> could be the unknown in fact).
>
>> - why your passing doesn't start at 0 and end at 100?
>>
> It is just an example.
>
>> - running your example script, I get 505 spheres, why not 390?
>>
> Precisely because we are initially just guessing the volume of solids by
> the number of particles and the meanRadius.
>
In other words one has to try different initial numbers of particles to
match the actual number (the number of grains you want).

>
>> I again improved makeCloud a bit in r2953. It is now very flexible:
>> - 2D/3D
>> - periodic or not
>> - uniform or psd-based size distributions
>> - distributions by mass or by number
>> - target packing by meanRad OR by number, in arbitrary size of box.
>>
> Oh excellent! Then I will try your function and perhaps we can remove mine
> which would be only redundant.
> Chiara
>
>>
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>
>

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