1 "LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
3 :link(lws,http://lammps.sandia.gov)
5 :link(lc,Section_commands.html#comm)
9 fix nve/asphere/noforce command :h3
13 fix ID group-ID nve/asphere/noforce :pre
15 ID, group-ID are documented in "fix"_fix.html command
16 nve/asphere/noforce = style name of this fix command :ul
20 fix 1 all nve/asphere/noforce
24 Perform updates of position and orientation, but not velocity or
25 angular momentum for atoms in the group each timestep. In other
26 words, the force and torque on the atoms is ignored and their velocity
27 and angular momentum are not updated. The atom velocities and
28 angularm momenta are used to update their positions and orientation.
30 This is useful as an implicit time integrator for Fast Lubrication
31 Dynamics, since the velocity and angular momentum are updated by the
32 "pair_style lubricuteU"_pair_lubricateU.txt command.
36 [Restart, fix_modify, output, run start/stop, minimize info:]
38 No information about this fix is written to "binary restart
39 files"_restart.html. None of the "fix_modify"_fix_modify.html options
40 are relevant to this fix. No global or per-atom quantities are stored
41 by this fix for access by various "output
42 commands"_Section_howto.html#howto_15. No parameter of this fix can
43 be used with the {start/stop} keywords of the "run"_run.html command.
44 This fix is not invoked during "energy minimization"_minimize.html.
48 This fix is part of the ASPHERE package. It is only enabled if LAMMPS
49 was built with that package. See the "Making
50 LAMMPS"_Section_start.html#start_3 section for more info.
52 This fix requires that atoms store torque and angular momementum and a
53 quaternion as defined by the "atom_style ellipsoid"_atom_style.html
56 All particles in the group must be finite-size. They cannot be point
57 particles, but they can be aspherical or spherical as defined by their
62 "fix nve/noforce"_fix_nve_noforce.html, "fix
63 nve/asphere"_fix_nve_asphere.html