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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@12414 f3b2605a-c512-4ea7-a41b-209d697bcdaa

This commit is contained in:
sjplimp 2014-09-05 16:58:30 +00:00
parent ed06a4859e
commit 076914c7ab
2 changed files with 21 additions and 5 deletions
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14
doc/fix_addforce.html
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@ -27,9 +27,11 @@
</PRE>
<LI>zero or more keyword/value pairs may be appended to args
<LI>keyword = <I>region</I> or <I>energy</I>
<LI>keyword = <I>every</I> or <I>region</I> or <I>energy</I>
<PRE> <I>region</I> value = region-ID
<PRE> <I>every</I> value = Nevery
Nevery = add force every this many timesteps
<I>region</I> value = region-ID
region-ID = ID of region atoms must be in to have added force
<I>energy</I> value = v_name
v_name = variable with name that calculates the potential energy of each atom in the added force field
@ -66,6 +68,10 @@ variables but can also include per-atom values, such as atom
coordinates. Thus it is easy to specify a spatially-dependent force
field with optional time-dependence as well.
</P>
<P>If the <I>every</I> keyword is used, the <I>Nevery</I> setting determines how
often the forces are applied. The default value is 1, for every
timestep.
</P>
<P>If the <I>region</I> keyword is used, the atom must also be in the
specified geometric <A HREF = "region.html">region</A> in order to have force added
to it.
@ -171,6 +177,8 @@ the system (the quantity being minimized), you MUST enable the
</P>
<P><A HREF = "fix_setforce.html">fix setforce</A>, <A HREF = "fix_aveforce.html">fix aveforce</A>
</P>
<P><B>Default:</B> none
<P><B>Default:</B>
</P>
<P>The option default for the every keyword is every = 1.
</P>
</HTML>

12
doc/fix_addforce.txt
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@ -18,7 +18,9 @@ addforce = style name of this fix command :l
fx,fy,fz = force component values (force units) :l
any of fx,fy,fz can be a variable (see below) :pre
zero or more keyword/value pairs may be appended to args :l
keyword = {region} or {energy} :l
keyword = {every} or {region} or {energy} :l
{every} value = Nevery
Nevery = add force every this many timesteps
{region} value = region-ID
region-ID = ID of region atoms must be in to have added force
{energy} value = v_name
@ -55,6 +57,10 @@ variables but can also include per-atom values, such as atom
coordinates. Thus it is easy to specify a spatially-dependent force
field with optional time-dependence as well.
If the {every} keyword is used, the {Nevery} setting determines how
often the forces are applied. The default value is 1, for every
timestep.
If the {region} keyword is used, the atom must also be in the
specified geometric "region"_region.html in order to have force added
to it.
@ -160,4 +166,6 @@ the system (the quantity being minimized), you MUST enable the
"fix setforce"_fix_setforce.html, "fix aveforce"_fix_aveforce.html
[Default:] none
[Default:]
The option default for the every keyword is every = 1.