Pair stress approximation

Pair stress approximation (Eq. 3.18)

$\rho B_{2}={\frac {q}{(1+q)^{B_{3}}}}$

where Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle q=P/k_{B}T\rho -1} , $B_{2}$ is the second virial coefficient and $B_{3}$ is the third virial coefficient.

See also

• Scaled-particle theory
• BBGKY hierarchy