Hi
How to give particle size distribution in a poly disperse system?
What pair style are you using for particle
interactions? If it's LJ, then you can have different
atom types, and specify different sigma with
the pair_coeff command. Other pair styles
use atom_style sphere which defines a diameter
for each atom.
Steve
... but the number of particles, and the size of each of these
particles must be manually specified by you. I don't know how
familiar you are with LAMMPS, but one way is to create a data file
containing at least an "Atoms" section containing a list of atomic
coordinates and other properties, a "Masses" section, and a "Pair
Coeffs" section containing your atomic sizes, and you would use the
"read_data" command to load it into LAMMPS. For an example of the
"data" file format, go to:
"examples/micelle/data.micelle"
These example directories are distributed with LAMMPS which you can
download here:
http://lammps.sandia.gov/download.html
Details about the "read_data" is explained here:
http://lammps.sandia.gov/doc/Section_commands.html
http://lammps.sandia.gov/doc/read_data.html
If you are talking about polydisperse polymers, or other molecules,
then that is a different story. In that case, we may still be able to
help you, but my advice would be different.