forked from lijiext/lammps
59 lines
1.8 KiB
HTML
59 lines
1.8 KiB
HTML
<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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<HR>
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<H3>compute smd/contact_radius command
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</H3>
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<P><B>Syntax:</B>
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</P>
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<PRE>compute ID group-ID smd/contact_radius
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</PRE>
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<UL><LI>ID, group-ID are documented in <A HREF = "compute.html">compute</A> command
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<LI>smd/contact_radius = style name of this compute command
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>compute 1 all smd/contact_radius
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>Define a computation which outputs the contact radius, i.e., the radius used to prevent particles from penetrating each other.
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The contact radius is used only to prevent particles belonging to different physical bodies from penetrating each other. It is used by the contact pair styles,
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e.g., smd/hertz and smd/tri_surface.
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</P>
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<P>See <A HREF = "USER/smd/SMD_LAMMPS_userguide.pdf">this PDF guide</A> to using Smooth Mach Dynamics in
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LAMMPS.
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</P>
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<P>The value of the contact radius will be 0.0 for particles not in the
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specified compute group.
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</P>
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<P><B>Output info:</B>
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</P>
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<P>This compute calculates a per-particle vector, which can be accessed by
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any command that uses per-particle values from a compute as input. See
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<A HREF = "Section_howto.html#howto_15">Section_howto 15</A> for an overview of
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LAMMPS output options.
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</P>
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<P>The per-particle vector values will be in distance <A HREF = "units.html">units</A>.
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</P>
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<P><B>Restrictions:</B>
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</P>
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<P>This compute is part of the USER-SMD 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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</P>
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<P><B>Related commands:</B>
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</P>
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<P><A HREF = "dump.html">dump custom</A> smd/hertz smd/tri_surface
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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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