forked from lijiext/lammps
56 lines
1.6 KiB
Plaintext
56 lines
1.6 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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fix addforce command :h3
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[Syntax:]
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fix ID group-ID addforce fx fy fz :pre
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ID, group-ID are documented in "fix"_fix.html command
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addforce = style name of this fix command
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fx,fy,fz = force component values (force units) :ul
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[Examples:]
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fix kick flow addforce 1.0 0.0 0.0 :pre
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[Description:]
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Add fx,fy,fz to the corresponding component of force for each atom in
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the group. This command can be used to give an additional push to
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atoms in a simulation, such as for a simulation of Poiseuille flow in
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a channel.
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[Restart, fix_modify, output, run start/stop, minimize info:]
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No information about this fix is written to "binary restart
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files"_restart.html. None of the "fix_modify"_fix_modify.html options
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are relevant to this fix.
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This fix computes a 3-vector of forces, which can be accessed by
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various "output commands"_Section_howto.html#4_15. This is the total
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force on the group of atoms before the forces on individual atoms are
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changed by the fix. The vector values calculated by this fix are
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"extensive", meaning they scale with the number of atoms in the
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simulation.
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No parameter of this fix can be used with the {start/stop} keywords of
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the "run"_run.html command.
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The forces due to this fix are imposed during an energy minimization,
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invoked by the "minimize"_minimize.html command.
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[Restrictions:] none
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[Related commands:]
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"fix setforce"_fix_setforce.html, "fix aveforce"_fix_aveforce.html
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[Default:] none
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