Packing fraction
From SklogWiki
For the hard sphere fluid
\[ \eta = \frac{ \pi }{6} \frac{ N \sigma^3 }{V} \]
where \( \sigma \) is the hard sphere diameter.
For the hard sphere fluid
\[ \eta = \frac{ \pi }{6} \frac{ N \sigma^3 }{V} \]
where \( \sigma \) is the hard sphere diameter.