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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@10733 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp
2013-09-09 14:56:22 +00:00
parent bd0aa92c79
commit b6b09747fc
2 changed files with 16 additions and 20 deletions
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18
doc/velocity.html
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@ -112,15 +112,6 @@ angular will set the angular momentum of each rigid body to zero.
This is done by adjusting the velocities of the atoms in each rigid
body.
</P>
<P>IMPORTANT NOTE: When using the <I>rigid</I> option with the <I>zero</I> style,
only the velocities of atoms that are in the group specified with the
velocity command will be adjusted, and likewise contribute to the
calculation of the center-of-mass velocity or angular momentum of each
rigid body. This allows you to zero out the momenta of a subset of
the rigid bodies, but you will get incomplete zeroing if you specify a
group that includes only a subset of the atoms in one or more of the
rigid bodies.
</P>
<P>All temperatures specified in the velocity command are in temperature
units; see the <A HREF = "units.html">units</A> command. The units of velocities and
coordinates depend on whether the <I>units</I> keyword is set to <I>box</I> or
@ -200,6 +191,12 @@ stored on a particular machine.
</P>
<HR>
<P>The <I>rigid</I> option only has meaning when used with the <I>zero</I> style.
It allows specification of a fix-ID for one of the <A HREF = "fix_rigid.html">rigid-body
fix</A> variants which defines a set of rigid bodies. The
zeroing of linear or angular momentum is then performed for each rigid
body defined by the fix, as described above.
</P>
<P>The <I>units</I> option is used by <I>set</I> and <I>ramp</I>. If units = box,
the velocities and coordinates specified in the velocity command are
in the standard units described by the <A HREF = "units.html">units</A> command
@ -217,6 +214,7 @@ command must have been previously used to define the lattice spacing.
<P><B>Default:</B>
</P>
<P>The option defaults are dist = uniform, sum = no, mom = yes, rot = no,
temp = full style on group-ID, loop = all, and units = lattice.
temp = full style on group-ID, loop = all, and units = lattice. The
rigid option is not defined by default.
</P>
</HTML>

18
doc/velocity.txt
View File

@ -104,15 +104,6 @@ angular will set the angular momentum of each rigid body to zero.
This is done by adjusting the velocities of the atoms in each rigid
body.
IMPORTANT NOTE: When using the {rigid} option with the {zero} style,
only the velocities of atoms that are in the group specified with the
velocity command will be adjusted, and likewise contribute to the
calculation of the center-of-mass velocity or angular momentum of each
rigid body. This allows you to zero out the momenta of a subset of
the rigid bodies, but you will get incomplete zeroing if you specify a
group that includes only a subset of the atoms in one or more of the
rigid bodies.
All temperatures specified in the velocity command are in temperature
units; see the "units"_units.html command. The units of velocities and
coordinates depend on whether the {units} keyword is set to {box} or
@ -192,6 +183,12 @@ stored on a particular machine.
:line
The {rigid} option only has meaning when used with the {zero} style.
It allows specification of a fix-ID for one of the "rigid-body
fix"_fix_rigid.html variants which defines a set of rigid bodies. The
zeroing of linear or angular momentum is then performed for each rigid
body defined by the fix, as described above.
The {units} option is used by {set} and {ramp}. If units = box,
the velocities and coordinates specified in the velocity command are
in the standard units described by the "units"_units.html command
@ -209,4 +206,5 @@ command must have been previously used to define the lattice spacing.
[Default:]
The option defaults are dist = uniform, sum = no, mom = yes, rot = no,
temp = full style on group-ID, loop = all, and units = lattice.
temp = full style on group-ID, loop = all, and units = lattice. The
rigid option is not defined by default.