Moody chart and friction factor

Enter the flow and pipe data to get Re, the Darcy friction factor and the head loss, and see where the point sits on the Moody chart.

From flow data I know Re

Density (kg/m^3)Mean velocity (m/s)Dynamic viscosity (Pa s)

Pipe diameter D (m)Roughness (mm)MaterialPipe length L (m)

Reynolds number	1.270e5	turbulent
Relative roughness eps/D	4.500e-4
Darcy friction factor f	0.01951	Colebrook
Haaland estimate (check)	0.01927	1.2% off
Major head loss h_f = f (L/D) v^2 / 2g	1.604 m
Pressure drop rho g h_f	15.73 kPa

Colebrook: 1/sqrt(f) = -2 log10( (eps/D)/3.7 + 2.51/(Re sqrt(f)) ), solved by iteration. g = 9.81 m/s^2. Typical roughness values vary between sources; use the one your question gives.