Insert Particel inside a Geometry/Mesh

Submitted by Mrage90 on Thu, 01/28/2021 - 15:22

Hi,

Since I am new to DEM, I have a very basic question. Is there a way to fill a geometry with particles by using insert/pack? Maybe define the Geometry as a Region in some way?

Any help appreciated. Thanks. Regards,
Leandro

Forums:

mschramm | Thu, 01/28/2021 - 18:25

Hello,
At the end of the day, you will be needing to use the region command. From here you can keep things simple or go complicated.
Let's say you have a stl file of a box for your geometry. To fill this box, you would use the region command and create a block (like you do when defining the simulation domain).
Now let's say you have the geometry of a rabbit that you wish to pack with spheres. Here you would use a tet/mesh region.
https://www.cfdem.com/particle-insertion-packing-generation
https://www.cfdem.com/media/DEM/docu/region.html

Mrage90 | Tue, 02/02/2021 - 15:10

since it is just a cylinder i need to fill i used the region command:
region reg_cyl cylinder z 0 0 0.04 0.01 0.12 units box

and filled the particles by using:
fix ins all insert/rate/region seed 123457 distributiontemplate pdd1 nparticles 400 particlerate 50000 insert_every 100 overlapcheck yes region reg_cyl ntry_mc 10000

which worked fine for me. Thanks a lot!