For Newton number, see also Kissing number in the sphere packing problem

The power number Np (also known as Newton number) is a commonly-used dimensionless number relating the resistance force to the inertia force.

The power-number has different specifications according to the field of application. E.g., for stirrers the power number is defined as\[ N_{\mathrm{p}} = {P\over \rho n^{3} d^{5}} \]

with

References

  1. J Wei, J L Anderson, K B Bischoff Advances in Chemical Engineering, Volume 17 Academic Press (1991) ISBN 0-12-008517-8 page 44

See also

de:Newton-Zahl

fi:Newtonin luku fr:Nombre de puissance mk:Њутнов број ru:Число Ньютона (физика) ar:عدد الإستطاعة