Weird behaviour with small particles

Submitted by pipegaldames on Fri, 06/07/2013 - 19:26

Hi all,

I try run a simulation with small particles, for this I use two distributions of particles with radius 0.0001 and 0.00015.
The simulation run fine, but when the particles in contact with the geometry jumps far away beyond the box.

For example, I modify the example "chute_wear" and just change the radius of particles and the results are like i said (
see attachment).

Any idea for help me in this problem?

Regards,
Felipe

AttachmentSize
Image icon Last snapshot38 KB
Binary Data all snapshot2.59 MB

Forums:

cstoltz | Mon, 06/10/2013 - 12:06

If you reduced the particle size w/o changing the material properties or the timestep, then the timestep in that example would likely be much too large. Good rule of thumb is to set the timestep ~20% of the Rayleigh time or less for stability. See documentation of the pair_styles for details.

Best regards,
Chris