Science Fair Project Encyclopedia
Knudsen number
The Knudsen number (Kn) is a dimensionless number defined as the ratio of the molecular mean free path length to a representative physical length scale.
It is defined as:
where
- T, temperature (K)
- kB, Boltzmann's constant
- P, total pressure (Pa)
- σ, diameter (m)
See also
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details