Prandtl number
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Encyclopedic overview
The Prandtl number (Pr) is a dimensionless number, named for the German fluid dynamicist Ludwig Prandtl. It is defined as the ratio of momentum diffusivity to thermal diffusivity. The Prandtl number is a ratio of physical properties that may be arranged in several ways
P r
Excerpted from Wikipedia’s “Prandtl number” article, available under the CC BY-SA 4.0 licence.