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Old 10-13-2010, 06:25 PM   #5 (permalink)
aerohead
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6380?

Quote:
Originally Posted by Patrick View Post
20,000,000 seems awfully high. From memory (it's been a long time . . .) the rule of thumb for Reynolds number at STP was 10,000 X MPH X length in feet, which would yield 10K X 60 X 14 = 8,400,000. This seems more reasonable to me.
Patrick,sometimes kinematic viscosity is given as it's reciprocal,which for standard air is 6380.
In my table of SI units kinematic viscosities listed have been multiplied by 10,000.

The formula I have for Reynolds number is also from Daugherty.Hucho uses the same equation.
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