forked from lijiext/lammps
61 lines
1.4 KiB
Plaintext
61 lines
1.4 KiB
Plaintext
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.. index:: compute smd/rho
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compute smd/rho command
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=======================
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Syntax
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""""""
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.. parsed-literal::
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compute ID group-ID smd/rho
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* ID, group-ID are documented in :doc:`compute <compute>` command
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* smd/rho = style name of this compute command
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Examples
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""""""""
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.. parsed-literal::
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compute 1 all smd/rho
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Description
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"""""""""""
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Define a computation that calculates the per-particle mass density.
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The mass density is the mass of a particle which is constant during
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the course of a simulation, divided by its volume, which can change
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due to mechanical deformation.
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See `this PDF guide <USER/smd/SMD_LAMMPS_userguide.pdf>`_ to use Smooth
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Mach Dynamics in LAMMPS.
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**Output info:**
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This compute calculates a per-particle vector, which can be accessed
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by any command that uses per-particle values from a compute as input.
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See :ref:`How-to discussions, section 6.15 <howto_15>` for
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an overview of LAMMPS output options.
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The per-particle values will be in :doc:`units <units>` of mass over volume.
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Restrictions
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""""""""""""
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This compute is part of the USER-SMD package. It is only enabled if
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LAMMPS was built with that package. See the :ref:`Making LAMMPS <start_3>` section for more info.
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Related commands
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""""""""""""""""
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:doc:`compute smd/vol <compute_smd_vol>`
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**Default:** none
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.. _lws: http://lammps.sandia.gov
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.. _ld: Manual.html
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.. _lc: Section_commands.html#comm
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