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Atkinson friction factor is a measure of the resistance to airflow of a duct. It is widely used in the mine ventilation industry but is rarely referred to outside of it.
Atkinson friction factor is represented by the symbol and has the same units as air density (kilograms per cubic metre in SI units, lbfmin^2/ft^4 in Imperial units). It is related to the more widespread Fanning friction factor by
in which is the density of air in the shaft or roadway under consideration and is Fanning friction factor (dimensionless). It is related to the Darcy friction factor by
in which is the Darcy friction factor (dimensionless).
It was introduced by John J Atkinson in an early mathematical treatment of mine ventilation (1862) and has been known under his name ever since.
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Atkinsonfrictionfactor is a measure of the resistance to airflow of a duct. It is widely used in the mine ventilation industry but is rarely referred...
Frictionfactor may refer to: Atkinsonfrictionfactor, a measure of the resistance to airflow of a duct Darcy frictionfactor, in fluid dynamics Fanning...
\lambda } is Darcy frictionfactor in addition to the terms defined above. Atkinson also defined a frictionfactor (Atkinsonfrictionfactor) used for airways...
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and Tianjin in China, the Marianas, the Caroline Islands, Samoa) led to frictions with the UK, Russia, Japan, and the US. The largest colonial enterprises...
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road surfaces and weather, and actively heated by mechanical flexing and friction. Metal hot water heating pipes should not be used in long straight lengths...
order to reduce friction; Turn off all electrical gadgets i.e. Air Con/Radio; Adjust brakes or even disconnect them to reduce friction; Tape up cracks...
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