Closed random Sphere Pack

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Mohammad Faris
Mohammad Faris 2015-6-12
评论： Travis Sippel 2021-3-26
Hi Guys
I need a Closed Random sphere pack with radius distribution for my Master Thesis.
i write code and its run good.
but i have 1 problem.
When Matlab Place Some Spheres and check their Overlapping, some spheres have free space between each other and matlab cant place another sphere there. i need a porous space that have porosity about 35-37%. but matlab take too many time for make that porous. if anyone can help me plz reply. i need make closed sphere pack or transfer spheres to near each other.
Tnx
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Ismail Can Karaoglu
Ismail Can Karaoglu 2020-11-3
Hi, I also need such a code for my thesis. Could you please share the code with me?
My mail: ismailckaraoglu@gmail.com
Thanks in advance.
Travis Sippel
Travis Sippel 2021-3-26
Ismail, Mohammad, did you ever get this problem figured out?
Travis

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回答（1 个）

Giao Vu
Giao Vu 2019-11-15
are you using only 1 size sphere? you could try to make the spheres size adjustable (+-20%)and adjust the you code to 'shrink' or expand a little when needed.
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Giao Vu
Giao Vu 2019-11-15
for one size particle you can only obtain up to 35% porosity. (https://en.wikipedia.org/wiki/Random_close_pack). The higher the max_size/min_size ratio the smaller the porosity you can get. You can try first to randomly embed sphere in the medium, if successful, make the next step to expain it (for example 20%, if it doesn't work try sth like 19% and so forth).
In the case of overlapping, one coud try to calculate how much overlapping and shrink the particle accordingly (up to 20% less, for example).
There are different techniques, like in DEM (Discrete Element Method), after fill up the geometry, they start to run simulation to compact them. or you could also use periodic packing/boundary. You could try to look into opensource software like Woo or Yade where they have implemented this packing method.

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