Power number
Source: Wikipedia, the free encyclopedia.
- For Newton number, see also Kissing number in the sphere packing problem.
For use in arithmetic and algebra, see Exponentiation.
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:[1]
with
- P: power
- ρ: fluid density
- n: rotational speed in revolutions per second
- D: diameter of stirrer
References
- ISBN 978-0-08-056564-4.
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