: 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:
:
with
*''P'':
power
*''ρ'':
fluid
In physics, a fluid is a liquid, gas, or other material that continuously deforms (''flows'') under an applied shear stress, or external force. They have zero shear modulus, or, in simpler terms, are substances which cannot resist any shear ...
density
*''n'':
rotational speed in revolutions per second
*''D'':
diameter of stirrer
References
Dimensionless numbers of fluid mechanics
Fluid dynamics
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