I am simulating the evaporation of argon droplet on a heating plate by molecular dynamic. I have a problem about how to set the lattice parameter. Because only the crystal have lattice, if I choose the liquid argon, how does it to gather in a formation of droplets. Please help me how to write input script.
The lattice command has nothing to do with dynamics. It is only
used to define a length scale (and set of points) useful for some
other commands. Like create_atoms. Once you have put
atoms wherever you put them (data file, create_atoms, etc),
then the atoms interact via the pair style you defined and its
parameters (e.g. epsilon, sigma for LJ). The lattice command
has nothing to do with it at that point.