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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@15173 f3b2605a-c512-4ea7-a41b-209d697bcdaa

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sjplimp
2016-06-14 22:35:59 +00:00
parent 80aca27acd
commit 0b92c9f075
4 changed files with 16 additions and 16 deletions
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10
doc/html/_sources/fix_spring_chunk.txt
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@ -37,13 +37,13 @@ of a compute com/chunk command defined in the input script. It is
used to compute the COMs of each chunk.
At the beginning of the first :doc:`run <run>` or
:doc:`minimize <miminize>` command after this fix is defined, the
initial COM of each chunk is calculated and stored as R0c, where C is
:doc:`minimize <minimize>` command after this fix is defined, the
initial COM of each chunk is calculated and stored as R0m, where M is
the chunk number. Thereafter, at every timestep (or minimization
iteration), the current COM of each chunk is calculated as Rc. A
restoring force of magnitude K (Rc - R0c) Mi / Mc is applied to each
iteration), the current COM of each chunk is calculated as Rm. A
restoring force of magnitude K (Rm - R0m) Mi / Mm is applied to each
atom in each chunk where *K* is the specified spring constant, Mi is
the mass of the atom, and Mc is the total mass of all atoms in the
the mass of the atom, and Mm is the total mass of all atoms in the
chunk. Note that *K* thus represents the spring constant for the
total force on each chunk of atoms, not for a spring applied to each
atom.