Commit 147d430a authored by Richard Berger's avatar Richard Berger
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Update pair_body_nparticle docs

parent e339e173
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+17 −13
Original line number Diff line number Diff line
.. index:: pair\_style body/nparticle
.. index:: pair_style body/nparticle

pair\_style body/nparticle command
==================================
pair_style body/nparticle command
=================================

Syntax
""""""


.. parsed-literal::
.. code-block:: LAMMPS

   pair_style body/nparticle cutoff

@@ -17,10 +17,10 @@ Examples
""""""""


.. parsed-literal::
.. code-block:: LAMMPS

   pair_style body/nparticle 3.0
   pair_coeff \* \* 1.0 1.0
   pair_coeff * * 1.0 1.0
   pair_coeff 1 1 1.0 1.5 2.5

Description
@@ -67,11 +67,15 @@ The interaction between two sub-particles, or a sub-particle and point
particle, or between two point particles is computed as a Lennard-Jones
interaction, using the standard formula

.. image:: Eqs/pair_lj.jpg
   :align: center
.. math::

where Rc is the cutoff.  As explained above, an interaction involving
one or two body sub-particles may be computed even for r > Rc.
   E & = 4 \epsilon \left[ \left(\frac{\sigma}{r}\right)^{12} -
                       \left(\frac{\sigma}{r}\right)^6 \right]
                       \qquad r < R_c \\


where :math:`R_c` is the cutoff.  As explained above, an interaction involving
one or two body sub-particles may be computed even for :math:`r > R_c`.

For style *body*\ , the following coefficients must be defined for each
pair of atoms types via the :doc:`pair_coeff <pair_coeff>` command as in
@@ -79,8 +83,8 @@ the examples above, or in the data file or restart files read by the
:doc:`read_data <read_data>` or :doc:`read_restart <read_restart>`
commands:

* epsilon (energy units)
* sigma (distance units)
* :math:`\epsilon` (energy units)
* :math:`\sigma` (distance units)
* cutoff (distance units)

The last coefficient is optional.  If not specified, the global cutoff
@@ -94,7 +98,7 @@ is used.

For atom type pairs I,J and I != J, the epsilon and sigma coefficients
and cutoff distance for all of this pair style can be mixed.  The
default mix value is *geometric*\ .  See the "pair\_modify" command for
default mix value is *geometric*\ .  See the :doc:`pair_modify <pair_modify>` command for
details.

This pair style does not support the :doc:`pair_modify <pair_modify>`