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compute smd/rho command
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LAMMPS documentation
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<li><a
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compute smd/rho command
</a><ul>
<li><a
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Syntax
</a></li>
<li><a
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Examples
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Description
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Restrictions
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Related commands
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compute smd/rho command
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<div
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id=
"compute-smd-rho-command"
>
<span
id=
"index-0"
></span><h1>
compute smd/rho command
</h1>
<div
class=
"section"
id=
"syntax"
>
<h2>
Syntax
</h2>
<div
class=
"highlight-default"
><div
class=
"highlight"
><pre><span></span><span
class=
"n"
>
compute
</span>
<span
class=
"n"
>
ID
</span>
<span
class=
"n"
>
group
</span><span
class=
"o"
>
-
</span><span
class=
"n"
>
ID
</span>
<span
class=
"n"
>
smd
</span><span
class=
"o"
>
/
</span><span
class=
"n"
>
rho
</span>
</pre></div>
</div>
<ul
class=
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<li>
ID, group-ID are documented in
<a
class=
"reference internal"
href=
"compute.html"
><span
class=
"doc"
>
compute
</span></a>
command
</li>
<li>
smd/rho = style name of this compute command
</li>
</ul>
</div>
<div
class=
"section"
id=
"examples"
>
<h2>
Examples
</h2>
<div
class=
"highlight-default"
><div
class=
"highlight"
><pre><span></span><span
class=
"n"
>
compute
</span>
<span
class=
"mi"
>
1
</span>
<span
class=
"nb"
>
all
</span>
<span
class=
"n"
>
smd
</span><span
class=
"o"
>
/
</span><span
class=
"n"
>
rho
</span>
</pre></div>
</div>
</div>
<div
class=
"section"
id=
"description"
>
<h2>
Description
</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
class=
"std std-ref"
>
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"
><span
class=
"doc"
>
units
</span></a>
of mass over volume.
</p>
</div>
<div
class=
"section"
id=
"restrictions"
>
<h2>
Restrictions
</h2>
<p>
This compute is part of the USER-SMD package. It is only enabled if
LAMMPS was built with that package. See the
<span
class=
"xref std std-ref"
>
Making LAMMPS
</span>
section for more info.
</p>
</div>
<div
class=
"section"
id=
"related-commands"
>
<h2>
Related commands
</h2>
<p><a
class=
"reference internal"
href=
"compute_smd_vol.html"
><span
class=
"doc"
>
compute smd/vol
</span></a></p>
<p><strong>
Default:
</strong>
none
</p>
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