60 lines
1.3 KiB
ReStructuredText
60 lines
1.3 KiB
ReStructuredText
.. 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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.. code-block:: LAMMPS
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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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.. code-block:: LAMMPS
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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 <PDF/MACHDYN_LAMMPS_userguide.pdf>`_ to use Smooth
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Mach Dynamics in LAMMPS.
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Output info
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"""""""""""
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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 the :doc:`Howto output <Howto_output>` page for an overview of
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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 MACHDYN package. It is only enabled if
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LAMMPS was built with that package. See the :doc:`Build package
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<Build_package>` page 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
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"""""""
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none
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