forked from lijiext/lammps
54 lines
1.4 KiB
HTML
54 lines
1.4 KiB
HTML
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<HTML>
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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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</CENTER>
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<HR>
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<H3>communicate command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>communicate style
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</PRE>
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<UL><LI>style = <I>single</I> or <I>multi</I>
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>communicate multi
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>This command sets the style of inter-processor communication that
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occurs each timestep as atom coordinates and other properties are
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exchanged between neighboring processors.
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</P>
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<P>The default style is <I>single</I> which means each processor acquires
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information for ghost atoms that are within a single distance from its
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sub-domain. The distance is the maximum of the neighbor cutoff for
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all atom type pairs.
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</P>
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<P>For many systems this is an efficient algorithm, but for systems with
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widely varying cutoffs for different type pairs, the <I>multi</I> style can
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be faster. In this case, each atom type is assigned its own distance
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cutoff for communication purposes, and fewer atoms will be
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communicated. See the <A HREF = "neighbor.html">neighbor multi</A> command for a
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neighbor list construction option that may also be beneficial for
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simulations of this kind.
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</P>
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<P><B>Restrictions:</B> none
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</P>
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<P><B>Related commands:</B>
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</P>
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<P><A HREF = "neighbor.html">neighbor</A>
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</P>
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<P><B>Default:</B>
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</P>
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<P>style = single
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</P>
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</HTML>
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