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rLAMMPS lammps
fix_meso_stationary.html
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<HTML>
<CENTER><A HREF = "http://lammps.sandia.gov">LAMMPS WWW Site</A> - <A HREF = "Manual.html">LAMMPS Documentation</A> - <A HREF = "Section_commands.html#comm">LAMMPS Commands</A>
</CENTER>
<HR>
<H3>fix meso/stationary command
</H3>
<P><B>Syntax:</B>
</P>
<PRE>fix ID group-ID meso/stationary
</PRE>
<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command
<LI>meso = style name of this fix command
</UL>
<P><B>Examples:</B>
</P>
<PRE>fix 1 boundary meso/stationary
</PRE>
<P><B>Description:</B>
</P>
<P>Perform time integration to update internal energy and local density,
but not position or velocity for atoms in the group each timestep.
This fix is needed for SPH simulations to correctly time-integrate
fixed boundary particles which constrain a fluid to a given region in
space.
</P>
<P>See <A HREF = "USER/sph/SPH_LAMMPS_userguide.pdf">this PDF guide</A> to using SPH in
LAMMPS.
</P>
<P><B>Restart, fix_modify, output, run start/stop, minimize info:</B>
</P>
<P>No information about this fix is written to <A HREF = "restart.html">binary restart
files</A>. None of the <A HREF = "fix_modify.html">fix_modify</A> options
are relevant to this fix. No global or per-atom quantities are stored
by this fix for access by various <A HREF = "Section_howto.html#howto_15">output
commands</A>. No parameter of this fix can
be used with the <I>start/stop</I> keywords of the <A HREF = "run.html">run</A> command.
This fix is not invoked during <A HREF = "minimize.html">energy minimization</A>.
</P>
<P><B>Restrictions:</B>
</P>
<P>This fix is part of the USER-SPH package. It is only enabled if
LAMMPS was built with that package. See the <A HREF = "Section_start.html#start_3">Making
LAMMPS</A> section for more info.
</P>
<P><B>Related commands:</B>
</P>
<P>"fix meso"
</P>
<P><B>Default:</B> none
</P>
</HTML>
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