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lammps/doc/_sources/fix_nve_tri.txt
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fix_nve_tri.txt
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.. index:: fix nve/tri
fix nve/tri command
===================
Syntax
""""""
.. parsed-literal::
fix ID group-ID nve/tri
* ID, group-ID are documented in :doc:`fix <fix>` command
* nve/tri = style name of this fix command
Examples
""""""""
.. parsed-literal::
fix 1 all nve/tri
Description
"""""""""""
Perform constant NVE integration to update position, velocity,
orientation, and angular momentum for triangular particles in the
group each timestep. V is volume; E is energy. This creates a system
trajectory consistent with the microcanonical ensemble. See
:doc:`Section_howto 14 <Section_howto>` of the manual for an overview of
using triangular particles.
This fix differs from the :doc:`fix nve <fix_nve>` command, which
assumes point particles and only updates their position and velocity.
Restart, fix_modify, output, run start/stop, minimize info
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
No information about this fix is written to :doc:`binary restart files <restart>`. None of the :doc:`fix_modify <fix_modify>` options
are relevant to this fix. No global or per-atom quantities are stored
by this fix for access by various :ref:`output commands <howto_15>`. No parameter of this fix can
be used with the *start/stop* keywords of the :doc:`run <run>` command.
This fix is not invoked during :doc:`energy minimization <minimize>`.
Restrictions
""""""""""""
This fix is part of the ASPHERE package. It is only enabled if LAMMPS
was built with that package. See the :ref:`Making LAMMPS <start_3>` section for more info.
This fix requires that particles be triangles as defined by the
:doc:`atom_style tri <atom_style>` command.
Related commands
""""""""""""""""
:doc:`fix nve <fix_nve>`, :doc:`fix nve/asphere <fix_nve_asphere>`
**Default:** none
.. _lws: http://lammps.sandia.gov
.. _ld: Manual.html
.. _lc: Section_commands.html#comm
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