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Prandtl Number

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Prandtl number is simply a physical property group used in heat transfer correlations:

(3.10)

The Nusselt number is a function of the Prandtl number. Care must be taken to make sure all units cancel. The most common units for the fluid properties, especially viscosity, do not cancel. SI units work well. If common English units are used, the viscosity must be converted to pounds mass/foot‐hour. The conversion is 1 cP = 2.419 lb/ft‐h.

Agitator Design for Gas-Liquid Fermenters and Bioreactors

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