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| : For '''Newton number''', see also [[Kissing number]] in the [[sphere packing]] problem
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| The '''power number''' ''N''<sub>p</sub> (also known as '''Newton number''') is a commonly used [[dimensionless number]] relating the [[resistance force]] to the [[inertia|inertia force]].
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| The power-number has different specifications according to the field of application. E.g., for
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| [[stirrer]]s the power number is defined as:
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| <math> N_{\mathrm{p}} = {P\over \rho n^{3} d^{5}} </math>
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| with
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| *''P'': [[Power (physics)|power]]
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| *''ρ'': [[fluid]] [[density]]
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| *''n'': [[rotational speed]]
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| *''d'': [[diameter]] of stirrer <ref name=Wei> J Wei, J L Anderson, K B Bischoff ''Advances in Chemical Engineering, Volume 17'' Academic Press (1991) ISBN 0-12-008517-8 page 44</ref>
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| == References ==
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| {{Reflist}}
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| == See also ==
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| * [[Reynolds number]]
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| * [[Archimedes number]]
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| [[Category:Dimensionless numbers of fluid mechanics]]
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| [[Category:Fluid dynamics]]
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| {{fluiddynamics-stub}}
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Revision as of 13:31, 5 March 2014
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