The momentum correction factor is expressed as
(where symbols have their usual meaning)
1
\({\rm{\beta = }}\frac{{\rm{1}}}{{{\rm{A}}{{\rm{V}}^{\rm{2}}}}}\int\limits_{\rm{A}} {{{\rm{\nu }}^{\rm{2}}}{\rm{dA}}} \)
2
\({\rm{\beta = }}\frac{{\rm{1}}}{{{\rm{A}}{{\rm{V}}^{\rm{2}}}}}\int\limits_{\rm{A}} {\nu {\rm{ dA}}}\)
3
\({\rm{\beta = }}\frac{{\rm{1}}}{{{\rm{A}}{{\rm{V}}^{\rm{3}}}}}\int\limits_{\rm{A}} {{{\rm{\nu }}^{\rm{2}}}{\rm{dA}}} \)
4
\({\rm{\beta = }}\frac{{\rm{1}}}{{{\rm{A}}{{\rm{V}}^{\rm{2}}}}}\int\limits_{\rm{A}} {{{\rm{\nu }}^{\rm{3}}}{\rm{dA}}} \)