[Yade-users] [Question #191084]: clumps - particle size distribution

2012-03-19 Thread Chiara Modenese
New question #191084 on Yade:
https://answers.launchpad.net/yade/+question/191084

Hi guys,
do you think is possible to follow a specific particle size distribution while 
using clumps? Does anybody have experience with that and maybe can suggest a 
simple method how to do it?

Thank you for suggestions,
Chiara

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Re: [Yade-users] [Question #191084]: clumps - particle size distribution

2012-03-19 Thread Christian Jakob
Question #191084 on Yade changed:
https://answers.launchpad.net/yade/+question/191084

Christian Jakob posted a new comment:
Hi Chiara,

I am also interested in how to do this in Yade.
I have experience how this can be done with PFC. The procedure is as follows:

1. Generate your packing with spheres.
2. Create templates of your clumps.
3. Replace spheres with clump templates (clumps should have same real volume as 
your spheres).

for example I send you the fish-code of my model:

;make a template of a clump with 2 overlapping spheres:
clump template make dyad 2 radii 0.5 0.5 pos (0.25, 0.5, 0.25) (-0.25, -0.25, 
-0.25)


;replace 5 percent of the spheres by clumps with my template called dyad:
clump replace 1 dyad 0.05

Regards,

Christian

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Re: [Yade-users] [Question #191084]: clumps - particle size distribution

2012-03-19 Thread Chiara Modenese
Question #191084 on Yade changed:
https://answers.launchpad.net/yade/+question/191084

Chiara Modenese gave more information on the question:
On 19/03/12 12:11, Christian Jakob wrote:
Thank you, Christian, it makes sense to me. I will try to do it in python.
Cheers, Chiara
> Question #191084 on Yade changed:
> https://answers.launchpad.net/yade/+question/191084
>
> Christian Jakob posted a new comment:
> Hi Chiara,
>
> I am also interested in how to do this in Yade.
> I have experience how this can be done with PFC. The procedure is as follows:
>
> 1. Generate your packing with spheres.
> 2. Create templates of your clumps.
> 3. Replace spheres with clump templates (clumps should have same real volume 
> as your spheres).
>
> for example I send you the fish-code of my model:
>
> ;make a template of a clump with 2 overlapping spheres:
> clump template make dyad 2 radii 0.5 0.5 pos (0.25, 0.5, 0.25) (-0.25, -0.25, 
> -0.25)
>
>
> ;replace 5 percent of the spheres by clumps with my template called dyad:
> clump replace 1 dyad 0.05
>
> Regards,
>
> Christian
>

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Re: [Yade-users] [Question #191084]: clumps - particle size distribution

2012-03-19 Thread Chiara Modenese
Question #191084 on Yade changed:
https://answers.launchpad.net/yade/+question/191084

Chiara Modenese gave more information on the question:
On 19/03/12 12:45, Chiara Modenese wrote:
> Question #191084 on Yade changed:
> https://answers.launchpad.net/yade/+question/191084
>
> Chiara Modenese gave more information on the question:
> On 19/03/12 12:11, Christian Jakob wrote:
> Thank you, Christian, it makes sense to me. I will try to do it in python.
> Cheers, Chiara
>> Question #191084 on Yade changed:
>> https://answers.launchpad.net/yade/+question/191084
>>
>> Christian Jakob posted a new comment:
>> Hi Chiara,
>>
>> I am also interested in how to do this in Yade.
>> I have experience how this can be done with PFC. The procedure is as follows:
>>
>> 1. Generate your packing with spheres.
>> 2. Create templates of your clumps.
>> 3. Replace spheres with clump templates (clumps should have same real volume 
>> as your spheres).
As to point 3., do you also account for the overlapping volume between 
the spheres somehow? Or do you neglect it?
>> for example I send you the fish-code of my model:
>>
>> ;make a template of a clump with 2 overlapping spheres:
>> clump template make dyad 2 radii 0.5 0.5 pos (0.25, 0.5, 0.25) (-0.25, 
>> -0.25, -0.25)
>>
>>
>> ;replace 5 percent of the spheres by clumps with my template called dyad:
>> clump replace 1 dyad 0.05
>>
>> Regards,
>>
>> Christian
>>

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Re: [Yade-users] [Question #191084]: clumps - particle size distribution

2012-03-19 Thread Christian Jakob
Question #191084 on Yade changed:
https://answers.launchpad.net/yade/+question/191084

Christian Jakob posted a new comment:
Of course!

In the case of two overlapping spheres you have to replace ( ) with ( () ), so 
you have calculate the volume of a sphere cap and subtract this from the sum of 
the volumes of this two overlapping spheres.
formula see here:

http://en.wikipedia.org/wiki/Spherical_cap

In PFC it is done automatically with this replace command, very
comfortable...

Please let us know, when you are successfull.

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Re: [Yade-users] [Question #191084]: clumps - particle size distribution

2012-04-04 Thread Launchpad Janitor
Question #191084 on Yade changed:
https://answers.launchpad.net/yade/+question/191084

Status: Open => Expired

Launchpad Janitor expired the question:
This question was expired because it remained in the 'Open' state
without activity for the last 15 days.

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