Creating an agglomerate from pack

Hi, agglomerates are called clumps in Yade. In order to create a packing with agglomerates or clumps you can simply use replaceByClumps [1]. You can find some related examples here [2].

HTH
Klaus

[1] https://yade-dem.org/doc/yade.wrapper.html?highlight=replacebyclump#yade.wrapper.BodyContainer.replaceByClumps
[2] https://github.com/yade/trunk/tree/master/examples/clumps

Hello Klaus,

Thanks for answering my question. However, I know how to create clumps and also it is not exactly what i want.

Maybe, I didn't explain very well.

The main question is: "Is there already some function capable of create another dense pack (pack 2) composed by many pack 1? Considering that the contact parameters between these pack 1 is different from parameters 1 (parameters 2). In other words, pack 2 keeps parameters 1 inside pack 1, but uses parameters 2 in the interaction", following the question before (https://answers.launchpad.net/yade/+question/291194).

Thanks for the moment.

Felipe

Hi Felipe,
maybe the problem is the definition of "agglomerate". Please give us more
information and be as specific as possible. Should it be rigid or elastic?
Should it be cohesive or not? Damagable or elastic?...

Anyway, I doubt there exists such a function. On the other hand, in any
case it is not difficult to write your own, using Klaus's suggestions,
maybe only changing appendClump if clump is not what you want.

Thanks for additional information
cheers
Jan

2016-04-28 4:52 GMT+02:00 Klaus Thoeni <<email address hidden>
>:

> Question #292672 on Yade changed:
> https://answers.launchpad.net/yade/+question/292672
>
> Status: Open => Answered
>
> Klaus Thoeni proposed the following answer:
> I don't get it but the functions replaceByClumps or appendClumped will
> exactly do what the picture is showing, unless you want to perform some
> sub-simulation on pack 1.
>
> In fact, the example triax-basic-with-clumps.py shows something very
> similar to what your picture is showing. I guess it's just a matter on
> how you import your pack1.
>
> You can create pack 1 in one simulation and save the packing as text
> file and then use it in your other simulation to create pack 2 using
> appendClumped:
>
> Simulation 1:
> # make some simulation to get pack1
> ...
> # export packing as simple text file
> export.text('pack1.spheres'))
>
> Simulation 2:
> # load pack1 maybe with some loop to create pack 2
> ...
> pack1=ymport.text('pack1.spheres',scale=1.0,shift=(0,0,0),color=[1,0,0],material=someMat)
> # you can use any material here
> clump,clumpspheres=O.bodies.appendClumped(pack1)
> ...
>
> You could also use the saved file to create a clump template which you
> can then use with replaceByClumps.
>
> HTH
> K
>
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Hello Klaus,

I have tested all information wich is your answer following step by step and also the examples inside the github and I understood the correct way to create an agglomerate by clumps.

I only am having some problem with the "replaceByClumps", but this problem can be solved if I study more. Don't worry about that.

thank you for answering me.

Felipe

Thanks Klaus Thoeni, that solved my question.

Hello Jan,

Thanks for answerign me. I was studying about Klaus said and I had concluded that he solved my problem.

By the way, you was right and the next question i will try to say more details about my question.

thanks for your attention.

felipe