66 lines
2.0 KiB
Plaintext
66 lines
2.0 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,Commands_all.html)
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:line
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fix nve/asphere/noforce command :h3
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[Syntax:]
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fix ID group-ID nve/asphere/noforce :pre
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ID, group-ID are documented in "fix"_fix.html command
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nve/asphere/noforce = style name of this fix command :ul
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[Examples:]
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fix 1 all nve/asphere/noforce
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[Description:]
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Perform updates of position and orientation, but not velocity or
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angular momentum for atoms in the group each timestep. In other
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words, the force and torque on the atoms is ignored and their velocity
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and angular momentum are not updated. The atom velocities and
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angular momenta are used to update their positions and orientation.
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This is useful as an implicit time integrator for Fast Lubrication
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Dynamics, since the velocity and angular momentum are updated by the
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"pair_style lubricuteU"_pair_lubricateU.html command.
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:line
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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. No global or per-atom quantities are stored
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by this fix for access by various "output commands"_Howto_output.html.
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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. This fix is not invoked during "energy
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minimization"_minimize.html.
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[Restrictions:]
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This fix is part of the ASPHERE package. It is only enabled if LAMMPS
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was built with that package. See the "Build
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package"_Build_package.html doc page for more info.
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This fix requires that atoms store torque and angular momentum and a
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quaternion as defined by the "atom_style ellipsoid"_atom_style.html
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command.
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All particles in the group must be finite-size. They cannot be point
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particles, but they can be aspherical or spherical as defined by their
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shape attribute.
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[Related commands:]
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"fix nve/noforce"_fix_nve_noforce.html, "fix
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nve/asphere"_fix_nve_asphere.html
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[Default:] none
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