Hi guys,
I am setting up a test case with a sand particle colliding into a sand bed. When I do small particles, I got the error saying that volume expectancy was too small. I want to have a mix of 100 micrometer and 10 micrometer particles. It seems there is a limit set in the particle template code.
What is the minimum diameter for particles that LIGGGHTS can handle? If I want to do smaller particles, can I scale gravity and other coefficients to overcome the limit?
There was a similar topic before:
node/493
Can anyone update if there have been any changes since last year?
Please advise.
Best,
Vu
ckloss | Thu, 10/18/2012 - 15:56
Hi Vu, you can use another
Hi Vu,
you can use another unit system (cgs or lj) to overcome that limit. If you're running SI units, you can quickly get dangerously close to machine precision for the particle volume as V=r^3. The limit that is currently set is kind of arbitrary, but the intention is to keep particle volume far enough away from machine precision, as some models (e.g. liquid bridge models) need to perform calculations with the particle volume
Cheers,
Christoph