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fix_eos_cv.txt
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.. index:: fix eos/cv
fix eos/cv command
==================
Syntax
""""""
.. parsed-literal::
fix ID group-ID eos/cv cv
* ID, group-ID are documented in :doc:`fix <fix>` command
* eos/cv = style name of this fix command
* cv = constant-volume heat capacity (energy/temperature units)
Examples
""""""""
.. parsed-literal::
fix 1 all eos/cv 0.01
Description
"""""""""""
Fix *eos/cv* applies a mesoparticle equation of state to relate the
particle internal energy (u_i) to the particle internal temperature
(dpdTheta_i). The *eos/cv* mesoparticle equation of state requires
the constant-volume heat capacity, and is defined as follows:
.. image:: Eqs/fix_eos-cv.jpg
:align: center
where Cv is the constant-volume heat capacity, u_cond is the internal
conductive energy, and u_mech is the internal mechanical energy. Note
that alternative definitions of the mesoparticle equation of state are
possible.
----------
Restrictions
""""""""""""
This command is part of the USER-DPD package. It is only enabled if
LAMMPS was built with that package. See the :ref:`Making LAMMPS <start_3>` section for more info.
This command also requires use of the :doc:`atom_style dpd <atom_style>`
command.
Related commands
""""""""""""""""
:doc:`fix shardlow <fix_shardlow>`, :doc:`pair dpd/fdt <pair_dpd_fdt>`
**Default:** none
----------
.. _Larentzos:
**(Larentzos)** J.P. Larentzos, J.K. Brennan, J.D. Moore, and
W.D. Mattson, "LAMMPS Implementation of Constant Energy Dissipative
Particle Dynamics (DPD-E)", ARL-TR-6863, U.S. Army Research
Laboratory, Aberdeen Proving Ground, MD (2014).
.. _lws: http://lammps.sandia.gov
.. _ld: Manual.html
.. _lc: Section_commands.html#comm
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