2011-08-28 04:09:27 +08:00
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<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>
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<HR>
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<H3>fix meso/stationary command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>fix ID group-ID meso/stationary
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</PRE>
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<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command
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<LI>meso = style name of this fix command
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>fix 1 boundary meso/stationary
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</PRE>
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<P><B>Description:</B>
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</P>
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2011-08-28 05:11:46 +08:00
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<P>Perform time integration to update internal energy and local density,
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but not position or velocity for atoms in the group each timestep.
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This fix is needed for SPH simulations to correctly time-integrate
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fixed boundary particles which constrain a fluid to a given region in
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space.
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</P>
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<P>See <A HREF = "USER/sph/SPH_LAMMPS_userguide.pdf">this PDF guide</A> to using SPH in
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LAMMPS.
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2011-08-28 04:09:27 +08:00
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</P>
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<P><B>Restart, fix_modify, output, run start/stop, minimize info:</B>
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</P>
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<P>No information about this fix is written to <A HREF = "restart.html">binary restart
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files</A>. None of the <A HREF = "fix_modify.html">fix_modify</A> options
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are relevant to this fix. No global or per-atom quantities are stored
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2011-12-14 04:43:36 +08:00
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by this fix for access by various <A HREF = "Section_howto.html#howto_15">output
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commands</A>. No parameter of this fix can
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be used with the <I>start/stop</I> keywords of the <A HREF = "run.html">run</A> command.
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2011-08-28 04:09:27 +08:00
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This fix is not invoked during <A HREF = "minimize.html">energy minimization</A>.
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</P>
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2011-08-28 05:11:46 +08:00
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<P><B>Restrictions:</B>
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</P>
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<P>This fix is part of the USER-SPH package. It is only enabled if
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LAMMPS was built with that package. See the <A HREF = "Section_start.html#start_3">Making
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LAMMPS</A> section for more info.
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2011-08-28 04:09:27 +08:00
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</P>
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<P><B>Related commands:</B>
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</P>
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<P>"fix meso"
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</P>
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<P><B>Default:</B> none
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</P>
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</HTML>
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