makeCloud

Asked by Fereshteh Salehi

Hello everybody
I am beginner in yade. I want to simulate a admixture with 70 percent of particles smaller than 10mm and 30 percent bigger than 10mm to 50mm.
I want to use makeCloud but I don't know how use psdSize and psdCumm.
Please explain about psdSize and psdCumm.
Thank you.

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Jan Stránský (honzik) said :
#1

Hello,

> I don't know how use psdSize and psdCumm.
> Please explain about psdSize and psdCumm.

please explain about what is the problem / what is not clear from the documentation [1], from the examples [2] and from other questions related to this topic [3]

> I want to simulate a admixture with 70 percent of particles smaller than 10mm and 30 percent bigger than 10mm to 50mm.

apart from PSD, you can just use rRelFuzz [1]

In general, creating makeCloud and two PSDs (either using true PSD or rRelFuzz), you use **one** instance of SpherePack and two calls of makeCloud:
###
sp = SpherePack()
sp.makeCloud(...) # particles bigger than 10mm to 50mm (I would start from the bigger)
sp.makeCloud(...) # particles smaller than 10mm. Note, the same "sp"
###

Cheers
Jan

[1] https://yade-dem.org/doc/yade.pack.html#yade._packSpheres.SpherePack.makeCloud
[2] https://gitlab.com/yade-dev/trunk/-/blob/master/examples/test/psd.py
[3] https://answers.launchpad.net/yade/+questions?field.search_text=psd

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