I am using LIGGGHTS to generate a cylindrical packing of spheres.
When I change the diameter of the spheres to 2 mm in the attached script, it doesn't converge to a solution. It works with 3, 4 and 5 mm values for the diameter, but not with 2 mm.
Do you know why?
Thanks in advance.
| Attachment | Size |
|---|---|
 packing.txt | 2.28 KB |
cstoltz | Tue, 03/29/2016 - 14:14
Your timestep needs to be
Your timestep needs to be adjusted with the particle size. At the moment, your timestep is far too large for 2mm particles. Use the fix_check/timestep/gran command to check your timestep, and keep it to approx 20% of the Rayleigh time to get a stable simulation.
Regards,
Chris