forked from lijiext/lammps
69 lines
2.4 KiB
HTML
69 lines
2.4 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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</CENTER>
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<HR>
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<H3>fix lb/pc 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 lb/pc
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</PRE>
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<UL><LI>ID, group-ID are documented in the <A HREF = "fix.html">fix</A> command
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<LI>lb/pc = 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 all lb/pc
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>Update the positions and velocities of the individual particles
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described by <I>group-ID</I>, experiencing velocity-dependent hydrodynamic
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forces, using the integration algorithm described in <A HREF = "#Mackay">Mackay et
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al.</A>. This integration algorithm should only be used if a
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user-specified value for the force-coupling constant used in <A HREF = "fix_lb_fluid.html">fix
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lb/fluid</A> has been set; do not use this integration
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algorithm if the force coupling constant has been set by default.
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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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by this fix for access by various <A HREF = "Section_howto.html#4_15">output
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commands</A>. No parameter of this fix can be
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used with the <I>start/stop</I> keywords of the <A HREF = "run.html">run</A> command.
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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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<P><B>Restrictions:</B>
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</P>
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<P>This fix is part of the USER-LB package. It is only enabled if LAMMPS
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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>Can only be used if a lattice-Boltzmann fluid has been created via the
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<A HREF = "fix_lb_fluid.html">fix lb/fluid</A> command, and must come after this
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command.
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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 = "fix_lb_fluid.html">fix lb/fluid</A> <A HREF = "fix_lb_rigid_pc_sphere.html">fix
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lb/rigid/pc/sphere</A>
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</P>
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<P><B>Default:</B> None.
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</P>
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<HR>
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<A NAME = "Mackay"></A>
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<P><B>(Mackay et al.)</B> Mackay, F. E., Ollila, S.T.T., and Denniston, C., Hydrodynamic Forces Implemented into LAMMPS through a lattice-Boltzmann fluid, Computer Physics Communications 184 (2013) 2021-2031.
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</P>
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</HTML>
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