forked from lijiext/lammps
61 lines
1.7 KiB
Plaintext
61 lines
1.7 KiB
Plaintext
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
|
|
|
:link(lws,http://lammps.sandia.gov)
|
|
:link(ld,Manual.html)
|
|
:link(lc,Section_commands.html#comm)
|
|
|
|
:line
|
|
|
|
fix oneway command :h3
|
|
|
|
[Syntax:]
|
|
|
|
fix ID group-ID N oneway region-ID direction :pre
|
|
|
|
ID, group-ID are documented in "fix"_fix.html command :ulb,l
|
|
oneway = style name of this fix command :l
|
|
N = apply this fix every this many timesteps :l
|
|
region-ID = ID of region where fix is active :l
|
|
direction = {x} or {-x} or {y} or {-y} or {z} or {-z} = coordinate and direction of the oneway constraint :l
|
|
:ule
|
|
|
|
[Examples:]
|
|
|
|
fix ions 10 oneway semi -x
|
|
fix all 1 oneway left -z
|
|
fix all 1 oneway right z :pre
|
|
|
|
[Description:]
|
|
|
|
Enforce that particles in the group and in a given region can only
|
|
move in one direction. This is done by reversing a particle's
|
|
velocity component, if it has the wrong sign in the specified
|
|
dimension. The effect is that the particle moves in one direction
|
|
only.
|
|
|
|
This can be used, for example, as a simple model of a semi-permeable
|
|
membrane, or as an implementation of Maxwell's demon.
|
|
|
|
:line
|
|
|
|
[Restart, fix_modify, output, run start/stop, minimize info:]
|
|
|
|
No information about this fix is written to "binary restart
|
|
files"_restart.html. None of the "fix_modify"_fix_modify.html options
|
|
are relevant to this fix. No global or per-atom quantities are stored
|
|
by this fix for access by various "output
|
|
commands"_Section_howto.html#howto_15. No parameter of this fix can
|
|
be used with the {start/stop} keywords of the "run"_run.html command.
|
|
This fix is not invoked during "energy minimization"_minimize.html.
|
|
|
|
[Restrictions:] none
|
|
|
|
[Related commands:]
|
|
|
|
"fix wall/reflect"_fix_wall_reflect.html command
|
|
|
|
[Default:] none
|
|
|
|
:line
|
|
|