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compute smd/rho command
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LAMMPS 15 Dec 2015 documentation
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compute smd/rho command
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<div
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>
<span
id=
"index-0"
></span><h1>
compute smd/rho command
<a
class=
"headerlink"
href=
"#compute-smd-rho-command"
title=
"Permalink to this headline"
>
¶
</a></h1>
<div
class=
"section"
id=
"syntax"
>
<h2>
Syntax
<a
class=
"headerlink"
href=
"#syntax"
title=
"Permalink to this headline"
>
¶
</a></h2>
<div
class=
"highlight-python"
><div
class=
"highlight"
><pre>
compute ID group-ID smd/rho
</pre></div>
</div>
<ul
class=
"simple"
>
<li>
ID, group-ID are documented in
<a
class=
"reference internal"
href=
"compute.html"
><em>
compute
</em></a>
command
</li>
<li>
smd/rho = style name of this compute command
</li>
</ul>
</div>
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<h2>
Examples
<a
class=
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¶
</a></h2>
<div
class=
"highlight-python"
><div
class=
"highlight"
><pre>
compute 1 all smd/rho
</pre></div>
</div>
</div>
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"description"
>
<h2>
Description
<a
class=
"headerlink"
href=
"#description"
title=
"Permalink to this headline"
>
¶
</a></h2>
<p>
Define a computation that calculates the per-particle mass density.
The mass density is the mass of a particle which is constant during
the course of a simulation, divided by its volume, which can change due to mechanical deformation.
</p>
<p>
See
<a
class=
"reference external"
href=
"USER/smd/SMD_LAMMPS_userguide.pdf"
>
this PDF guide
</a>
to use Smooth Mach Dynamics in LAMMPS.
</p>
<p><strong>
Output info:
</strong></p>
<p>
This compute calculates a per-particle vector, which can be accessed by
any command that uses per-particle values from a compute as input. See
<a
class=
"reference internal"
href=
"Section_howto.html#howto-15"
><span>
How-to discussions, section 6.15
</span></a>
for an overview of LAMMPS output options.
</p>
<p>
The per-particle values will be in
<a
class=
"reference internal"
href=
"units.html"
><em>
units
</em></a>
of mass over volume.
</p>
</div>
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>
<h2>
Restrictions
<a
class=
"headerlink"
href=
"#restrictions"
title=
"Permalink to this headline"
>
¶
</a></h2>
<p>
This compute is part of the USER-SMD package. It is only enabled if
LAMMPS was built with that package. See the
<a
class=
"reference internal"
href=
"Section_start.html#start-3"
><span>
Making LAMMPS
</span></a>
section for more info.
</p>
</div>
<div
class=
"section"
id=
"related-commands"
>
<h2>
Related commands
<a
class=
"headerlink"
href=
"#related-commands"
title=
"Permalink to this headline"
>
¶
</a></h2>
<p><a
class=
"reference internal"
href=
"compute_smd_vol.html"
><em>
smd/vol
</em></a></p>
<p><strong>
Default:
</strong>
none
</p>
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