capped_cylinder & barbell docs and/or computations could be improved

[richardh]

capped_cylinder computations could be improved - see notes included in the .py file, current model requires user to keep cap radius > cylinder radius

ticket submitted by Richard, but assigned to PAK, who may know what to do.

[richardh]

Whilst looking at ER calcs for barbell and capped_cylinder I note that there seems to be inconsistencies between the docs and the calculations. I suspect the calculation is OK but the docs need improvement?

e.g. concerning the sign of distance h, where for both models the docs say h is negative, but a note in capped_cylinder.c says it is positive.

e.g docs for both say "The scale factor is equivalent to the volume fraction of cylinders, each of volume, V" which is a little odd?

Suspect the orignal goal of this ticket to improve capped_cylinder calculations may have been done ? (need to look at github …)

[butler]

maybe this can be addressed in 4.3 along with paracrystalline models and validation of the be_polyelectrolyte