forked from lijiext/lammps
45 lines
1.1 KiB
HTML
45 lines
1.1 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 addforce 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 addforce fx fy fz
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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>addforce = style name of this fix command
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<LI>fx,fy,fz = force component values (force units)
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</UL>
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<P><B>Examples:</B>
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</P>
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<PRE>fix kick flow addforce 1.0 0.0 0.0
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</PRE>
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<P><B>Description:</B>
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</P>
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<P>Add fx,fy,fz to the corresponding component of force for each atom in
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the group. This command can be used to give an additional push to
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atoms in a simulation, such as for a simulation of Poiseuille flow in
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a channel.
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</P>
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<P>The forces due to this fix are also imposed during an energy
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minimization, invoked by the <A HREF = "minimize.html">minimize</A> command.
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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 = "fix_setforce.html">fix setforce</A>, <A HREF = "fix_aveforce.html">fix aveforce</A>
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</P>
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<P><B>Default:</B> none
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</P>
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