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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@3112 f3b2605a-c512-4ea7-a41b-209d697bcdaa

This commit is contained in:
sjplimp 2009-08-18 18:16:59 +00:00
parent c2a7dfcd7c
commit f483e4001e
2 changed files with 26 additions and 16 deletions
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21
doc/reset_timestep.html
View File

@ -45,14 +45,19 @@ write. See the <A HREF = "undump.html">undump</A> command or <A HREF = "restart
if necessary. New specifications for dump and restart files can be
given after the reset_timestep command is used.
</P>
<P>This command cannot be used when any fixes are defined that keep track
of time or the timestep in order to perform time-dependent operations.
Examples include the "ave" or "wall" fixes such as <A HREF = "fix_ave_spatial.html">fix
ave/spatial</A> or <A HREF = "fix_wall_lj126.html">fix
wall/lj126</A>, and also <A HREF = "fix_indent.html">fix
indent</A>. The wall and indeter fixes allow for a
velocity or other time-dependent parameter to be specified, which
would be messed up by resetting the timestep.
<P>This command cannot be used when any fixes are defined that keeps
track of elapsed time to perform time-dependent operations. Examples
include the "ave" fixes such as <A HREF = "fix_ave_spatial.html">fix
ave/spatial</A>. Also <A HREF = "fix_dt_reset.html">fix
dt/reset</A> and <A HREF = "fix_deposity.html">fix deposit</A>.
</P>
<P>There are other fixes which use the current timestep which may produce
unexpected behavior, but LAMMPS allows them to be in place when
resetting the timestep. For example, commands which thermostat the
system, e.g. <A HREF = "fix_nvt.html">fix nvt</A>, allow you to specify a target
temperature which ramps from Tstart to Tstop which may persist over
several runs. If you change the timestep, you may change the target
temperature.
</P>
<P>Restting the timestep will clear the flags for <A HREF = "compute.html">computes</A>
that may have calculated some quantity from a previous run. This

21
doc/reset_timestep.txt
View File

@ -42,14 +42,19 @@ write. See the "undump"_undump.html command or "restart
if necessary. New specifications for dump and restart files can be
given after the reset_timestep command is used.
This command cannot be used when any fixes are defined that keep track
of time or the timestep in order to perform time-dependent operations.
Examples include the "ave" or "wall" fixes such as "fix
ave/spatial"_fix_ave_spatial.html or "fix
wall/lj126"_fix_wall_lj126.html, and also "fix
indent"_fix_indent.html. The wall and indeter fixes allow for a
velocity or other time-dependent parameter to be specified, which
would be messed up by resetting the timestep.
This command cannot be used when any fixes are defined that keeps
track of elapsed time to perform time-dependent operations. Examples
include the "ave" fixes such as "fix
ave/spatial"_fix_ave_spatial.html. Also "fix
dt/reset"_fix_dt_reset.html and "fix deposit"_fix_deposity.html.
There are other fixes which use the current timestep which may produce
unexpected behavior, but LAMMPS allows them to be in place when
resetting the timestep. For example, commands which thermostat the
system, e.g. "fix nvt"_fix_nvt.html, allow you to specify a target
temperature which ramps from Tstart to Tstop which may persist over
several runs. If you change the timestep, you may change the target
temperature.
Restting the timestep will clear the flags for "computes"_compute.html
that may have calculated some quantity from a previous run. This