convert air flow to air velocity

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convert air flow to air velocity

Postby Craig » Tue Apr 12, 2005 10:00 am

can i convert cubic feet per minute to meters per second
Craig
 
Posts: 2
Joined: Tue Apr 12, 2005 9:49 am

Postby Guest » Tue Apr 12, 2005 6:10 pm

Yes, if you know the cross sectional area of the tube or duct it is flowing through. If you know the flow rate in cu ft/min, and the area, division will give you the flow rate in feet/minute. You can apply conversion factors to change the units.

Note the velocity computed is an average across the duct. Fluid mechanics is complex, but velocity will be higher in the center, zero at the duct walls, and build from zero at the walls to the central value according to a complex calculation. Since gases have low viscosity, the region where the velocity exhibits this behavior is fairly small.
Guest
 


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