.. index:: compute sph/t/atom

compute sph/t/atom command
===========================

Syntax
""""""

.. parsed-literal::

   compute ID group-ID sph/t/atom

* ID, group-ID are documented in :doc:`compute <compute>` command
* sph/t/atom = style name of this compute command

Examples
""""""""

.. code-block:: LAMMPS

   compute 1 all sph/t/atom

Description
"""""""""""

Define a computation that calculates the per-atom internal temperature
for each atom in a group.

The internal temperature is the ratio of internal energy over the heat
capacity associated with the internal degrees of freedom of an SPH
particles, i.e. a Smooth-Particle Hydrodynamics particle.

.. math::

    T_{int} = E_{int} / C_{V,int}

See `this PDF guide <USER/sph/SPH_LAMMPS_userguide.pdf>`_ to using SPH in
LAMMPS.

The value of the internal energy will be 0.0 for atoms not in the
specified compute group.

**Output info:**

This compute calculates a per-atom vector, which can be accessed by
any command that uses per-atom values from a compute as input.  See
the :doc:`Howto output <Howto_output>` doc page for an overview of
LAMMPS output options.

The per-atom vector values will be in temperature :doc:`units <units>`.

Restrictions
""""""""""""

This compute is part of the USER-SPH package.  It is only enabled if
LAMMPS was built with that package.  See the :doc:`Build package <Build_package>` doc page for more info.

Related commands
""""""""""""""""

:doc:`dump custom <dump>`

**Default:** none
