forked from lijiext/lammps
88 lines
2.7 KiB
Plaintext
88 lines
2.7 KiB
Plaintext
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
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:link(lws,http://lammps.sandia.gov)
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:link(ld,Manual.html)
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:link(lc,Section_commands.html#comm)
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:line
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pair_style zero command :h3
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[Syntax:]
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pair_style zero cutoff {nocoeff} :pre
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zero = style name of this pair style
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cutoff = global cutoff (distance units)
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nocoeff = ignore all pair_coeff parameters (optional) :l
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[Examples:]
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pair_style zero 10.0
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pair_style zero 5.0 nocoeff
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pair_coeff * *
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pair_coeff 1 2*4 3.0 :pre
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[Description:]
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Define a global or per-type cutoff length for the purpose of
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building a neighbor list and acquiring ghost atoms, but do
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not compute any pairwise forces or energies.
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This can be useful for fixes or computes which require a neighbor list
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to enumerate pairs of atoms within some cutoff distance, but when
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pairwise forces are not otherwise needed. Examples are the "fix
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bond/create"_fix_bond_create.html, "compute rdf"_compute_rdf.html,
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"compute voronoi/atom"_compute_voronoi_atom.html commands.
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Note that the "comm_modify cutoff"_comm_modify.html command can be
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used to insure communication of ghost atoms even when a pair style is
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not defined, but it will not trigger neighbor list generation.
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The optional {nocoeff} flag allows to read data files with a PairCoeff
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section for any pair style. Similarly, any pair_coeff commands
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will only be checked for the atom type numbers and the rest ignored.
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In this case, only the global cutoff will be used.
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The following coefficients must be defined for each pair of atoms
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types via the "pair_coeff"_pair_coeff.html command as in the examples
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above, or in the data file or restart files read by the
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"read_data"_read_data.html or "read_restart"_read_restart.html
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commands, or by mixing as described below:
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cutoff (distance units) :ul
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This coefficient is optional. If not specified, the global cutoff
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specified in the pair_style command is used. If the pair_style has
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been specified with the optional {nocoeff} flag, then a cutoff
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pair coefficient is ignored.
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:line
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[Mixing, shift, table, tail correction, restart, rRESPA info]:
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The cutoff distance for this pair style can be mixed. The default mix
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value is {geometric}. See the "pair_modify" command for details.
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This pair style does not support the "pair_modify"_pair_modify.html
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shift, table, and tail options.
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This pair style writes its information to "binary restart
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files"_restart.html, so pair_style and pair_coeff commands do not need
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to be specified in an input script that reads a restart file.
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This pair style can only be used via the {pair} keyword of the
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"run_style respa"_run_style.html command. It does not support the
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{inner}, {middle}, {outer} keywords.
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:line
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[Restrictions:] none
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[Related commands:]
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"pair_style none"_pair_none.html
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[Default:] none
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