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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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<H3>timestep command
</H3>
<P><B>Syntax:</B>
</P>
<PRE>timestep dt
</PRE>
<UL><LI>dt = timestep size (time units)
</UL>
<P><B>Examples:</B>
</P>
<PRE>timestep 2.0
timestep 0.003
</PRE>
<P><B>Description:</B>
</P>
<P>Set the timestep size for subsequent molecular dynamics simulations.
See the <A HREF = "units.html">units</A> command for a discussion of time units.
The default value for the timestep also depends on the choice of units
for the simulation; see the default values below.
</P>
<P>When the <A HREF = "run_style.html">run style</A> is <I>respa</I>, dt is the timestep for
the outer loop (largest) timestep.
</P>
<P><B>Restrictions:</B> none
</P>
<P><B>Related commands:</B>
</P>
<P><A HREF = "fix_dt_reset.html">fix dt/reset</A>, <A HREF = "run.html">run</A>,
<A HREF = "run_style.html">run_style</A> respa, <A HREF = "units.html">units</A>
</P>
<P><B>Default:</B>
</P>
timestep = 0.005 tau for units = lj<BR>
timestep = 1.0 fmsec for units = real<BR>
timestep = 0.001 psec for units = metal<BR>
timestep = 1.0e-8 sec (10 nsec) for units = si or cgs <BR>
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