forked from lijiext/lammps
47 lines
1.2 KiB
HTML
47 lines
1.2 KiB
HTML
|
<HTML>
|
||
|
|
<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>
|
||
|
|
</CENTER>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<H3>fix planeforce command
|
||
|
|
</H3>
|
||
|
|
<P><B>Syntax:</B>
|
||
|
|
</P>
|
||
|
|
<PRE>fix ID group-ID planeforce x y z
|
||
|
|
</PRE>
|
||
|
|
<UL><LI>ID, group-ID are documented in <A HREF = "fix.html">fix</A> command
|
||
|
|
<LI>lineforce = style name of this fix command
|
||
|
|
<LI>x y z = 3-vector that is normal to the plane
|
||
|
|
</UL>
|
||
|
|
<P><B>Examples:</B>
|
||
|
|
</P>
|
||
|
|
<PRE>fix hold boundary planeforce 1.0 0.0 0.0
|
||
|
|
</PRE>
|
||
|
|
<P><B>Description:</B>
|
||
|
|
</P>
|
||
|
|
<P>Adjust the forces on each atom in the group so that it's motion will
|
||
|
|
be in the plane specified by the normal vector (x,y,z). This is done
|
||
|
|
by subtracting out components of force perpendicular to the plane.
|
||
|
|
</P>
|
||
|
|
<P>If the initial velocity of the atom is 0.0 (or in the plane), then it
|
||
|
|
should continue to move in the plane thereafter.
|
||
|
|
</P>
|
||
|
|
<P>The forces due to this fix are also imposed during an energy
|
||
|
|
minimization, invoked by the <A HREF = "minimize.html">minimize</A> command.
|
||
|
|
</P>
|
||
|
|
<P><B>Restrictions:</B> none
|
||
|
|
</P>
|
||
|
|
<P><B>Related commands:</B>
|
||
|
|
</P>
|
||
|
|
<P><A HREF = "fix_lineforce.html">fix lineforce</A>
|
||
|
|
</P>
|
||
|
|
<P><B>Default:</B> none
|
||
|
|
</P>
|
||
|
|
</HTML>
|