Air Duct Components - Minor Dynamic Loss Coefficients Component or FittingMinor Loss Coefficient -ξ - 90o bend, sharp 1.3 90o bend, with vanes 0.7 90o bend, rounded radius/diameter duct <1 0.5 90o bend, rounded radius/diameter duct >1 0.25 45o bend, sharp 0.5 45o bend, rounded radius...
f = friction factor Again, as L and m are constants and f is assumed to be constant, the loss is taken to be Equ 3.28pLs=ks·12ρv2 And thus another problem is created, for f is not a constant but rather a function of absolute roughness and Reynolds Number. The Moody chart shown ...