Power number

In this article, we will explore Power number from different perspectives, analyzing its importance, impact and relevance in various contexts. From its origin to its evolution today, Power number has been the subject of interest and debate among experts, academics and hobbyists. Through a detailed analysis, we aim to shed light on the lesser-known aspects of Power number, as well as highlight its influence in fields as varied as science, culture, technology or society in general. With a multidisciplinary approach, we will address the multiple facets of Power number to provide a comprehensive and enriching vision on this topic.

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

The power number N_p (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:^[1]

N_{\mathrm {p} }={\frac {P}{\rho n^{3}D^{5}}}

with

P: power
ρ: fluid density
n: rotational speed in revolutions per second
D: diameter of stirrer

References

^ Seinfeld, John H (1991). Wei, J; Anderson, J L; Bischoff, K B (eds.). Advances in Chemical Engineering. Academic Press. p. 44. ISBN 978-0-08-056564-4.

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