Generating a random closepacking of spheres

Moderator: GiD Team

Post Reply
OskariNi
Posts: 2
Joined: Mon Feb 27, 2017 4:48 pm

Generating a random closepacking of spheres

Post by OskariNi »

Dear GiD team,

I'm trying to generate a random close packing of equal size spheres inside a rectangular volume. I have tried the radius expansion and other RBall options, with min radius factor 0,9999 and max radius factor 1,0001. It still doesn't generate equal size spheres and the packing is not very dense. I am using the evaluation version of GiD 13.0.1. Can you give some advice how to get better packings?

Cheers,
Oskari
User avatar
escolano
Posts: 1918
Joined: Sun Sep 05, 1982 10:51 pm

Re: Generating a random closepacking of spheres

Post by escolano »

Try also the 'Granular' sphere mesher with 'Constant' distribution size

Utilities->Preferences..
Meshing->Sphere/circle->Selected mesher: Sphere=Granular
Meshing->Sphere/circle->Granular->Distribution type: Constant
OskariNi
Posts: 2
Joined: Mon Feb 27, 2017 4:48 pm

Re: Generating a random closepacking of spheres

Post by OskariNi »

Hi,

Thanks for the reply. I was able to generate a pretty good packing with the radius expansion mode in RBall. I got a packing fraction of approximately 0.61 for spheres of radius 0.65 inside a cube of 10x10x10. However all the other modes gave me as a result a packing of 1 big sphere. I kept all the other options such as element size and iteration numbers constant. Is there a reason these other algorithms keep failing? I suppose the Optimization Radius should be at least pretty effective.

Cheers,
Oskari
Post Reply