Asphere particle with granular potential

Hello all,

I want to implement spherocylindrical particles with granular potential. I will track line segments in space and the granular potential will be implemented as done for spheres based on the overlap.

I feel the ellipsoid implementation from the Asphere package as a starting point would be best for such a task. I am well aware that Asphere package is not compatible with granular potential.

Can anyone please guide me if such an implementation is possible or has already been done in LAMMPS?

Thanks and kind regards,

Hello all,

I want to implement spherocylindrical particles with granular potential. I
will track line segments in space and the granular potential will be
implemented as done for spheres based on the overlap.

I feel the ellipsoid implementation from the Asphere package as a starting
point would be best for such a task. I am well aware that Asphere package is
not compatible with granular potential.

Can anyone please guide me if such an implementation is possible or has
already been done in LAMMPS?

what is possible largely depends on your creativity and programming
skills. there are certainly no obvious technical limitations on the
LAMMPS side.

what has been done is difficult to know, since most people do not
announce when they are attempting to implement a feature. also, there
is quite a bit of development going on that is not done in close
collaboration with the primary LAMMPS developers.

have you considered approximating your objects through (rigid)
collections of (overlapping) spherical particles?

axel.

From what I see, this isn’t available in the LIGGGHTS distribution either. Axel’s suggestion is probably the easiest, and more importantly its, more or less, state of the art. I’ve used it for studying irregular shaped cement particles. It’s what you’ll see being done at APS DFD or AICHE. I heard a talk by a guy studying how irregular shaped cereal pack using this fused particle approach. Its fairly standard.

I don’t know what a spherocylinder is, but I’ll add that

fix rigid and fix rigid/small have several options to allow

for rigid collections of overlapping granular spheroids to

be modeled. E.g. read/write mass, moments of inertia, etc.

Steve

I heard a talk by a guy studying how irregular shaped cereal pack using this fused particle approach. Its fairly standard.

I hope this in not another case of a serial offender …

http://lammps.sandia.gov/threads/msg55162.html

Steve

Yes, a “cereal” offender of the first kind…
Carlos

since we are in a playful mood today, i have a question:

i just brought a cake to the office (to celebrated sysadmin day. have you already thanked your sysadmins today?) that uses a multi-grain pancake mix batter as a base. does this make me a “cereal offender”, too?

axel.

One last from me.