Fixing the position of multisphere particles in the simulation domain

Submitted by hamedhoori on Tue, 05/09/2023 - 10:51

Hi,
I need to fix the position of some multisphere particles at a specific position in the simulation domain before starting a CFD-DEM simulation. I am having a hard time finding the right command or approach to do this. Is there any way to fix the position of each multisphere particle in the simulation?
Something like the "set" command for single particles in the "twoSphereGlowinskiMPI" tutorial files:
...
atom_type granular
....
# create single partciles
create_atoms 1 single 1.2 0.5 0.5 units box
set atom 1 diameter 0.18 density 1.5 x 1.2 y 0.5 z 0.5

I want to do something like this (fixing position) but for multisphere particles. I would appreciate it if anyone could help me.
Regards, Hamed.

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EmersonSouza | Wed, 02/14/2024 - 13:32

Hello,

I'm also interested in this problem. Have you managed to find a solution?

All the best
Emerson

EmersonSouza | Thu, 02/15/2024 - 14:45

Hi,

For my case, I have managed to create five spheres with five create_atoms and set commands, using as a reference another case in which I had used the create_multisphere_clump command to know exactly the final configuration of my spheres, with x y z r data.

I hope this helps,

All the best
Emerson

WSY_1998 | Mon, 11/18/2024 - 08:01

Hello,
I am also interested in the multisphere problems, but I meet a strange situation, after I finish compiling, there is no "create_multisphere_clump" command. Could you tell me how to solve this problem?
Regards, Siyuan.